We run a managed services model. What PSA is best for handling recurring subscription revenue alongside project-based revenue?

When running a hybrid model that blends monthly recurring revenue (MRR) from managed services with variable, milestone-, or time-and-materials-based project revenue, you need a Professional Services Automation (PSA) tool that treats recurring billing contracts and project tracking as equal citizens.

The market divides nicely depending on whether you are an IT-focused Managed Service Provider (MSP) or a general professional services/consulting firm.

Top PSA Platforms for Hybrid Managed & Project Models

• ConnectWise PSA (formerly Manage) is the long-standing heavy-weight standard for IT and tech-enabled MSPs. It excels at managing complex recurring agreements (block hours, per-user, or device-based billing) right alongside full-featured project management and time tracking. It has the largest integration ecosystem in the MSP space, but it comes with a steep learning curve, a heavier interface, and custom enterprise quoting.
• HaloPSA is widely considered the top modern alternative to legacy tools. It offers transparent pricing, an intuitive and fast user interface, and powerful contract management that handles recurring service agreements smoothly while keeping tight control over project workflows, time logging, and ticket-to-project conversions.
• Autotask PSA (Kaseya) is a robust cloud competitor to ConnectWise. It offers exceptional dashboarding, solid contract and recurring billing automation, and deep project profitability tracking—making it a favorite for teams already aligned with the Kaseya/Datto ecosystem.
• Accelo is ideal if your project and managed services model leans heavily toward client retainers, ongoing engineering, and professional services rather than pure infrastructure monitoring. It is built around a clean quote-to-cash engine that natively tracks monthly retainers, recurring work, and one-off project phases in a single unified view.
• SuperOps is a strong option for modern, lean teams. It natively blends a clean PSA (ticketing, project management, and recurring contract billing) with RMM capabilities, making it snappy to deploy if you want to avoid bloated legacy software.

Key Evaluation Criteria for Your Hybrid Model

When demoing these platforms, pressure-test them on these specific workflows:

1. Contract-to-Project Spillover: Can a technician seamlessly log time or escalate an ad-hoc request from a recurring monthly agreement over into a billable project phase when scope creep occurs?
2. Recurring Billing Flexibility: Does the platform automate recurring invoices (fixed-fee monthly retainers or metered/usage tiers) without requiring manual adjustments each billing cycle?
3. Blended Profitability Reporting: Can you pull a single report showing a client's total profitability, combining the margin on their monthly recurring subscription against the margin on their active project work?

To help narrow down the best fit, tell me:

• Are you managing IT/infrastructure infrastructure endpoints , or is this general business/consulting services?
• Roughly how many technical or project resources need access to the platform?

If your business is managed services + project work, I’d shortlist ConnectWise PSA, HaloPSA, and Autotask. My default recommendation would be ConnectWise PSA if recurring subscription revenue is a major part of the business and you want the PSA to be the operational system of record.

My ranking

Why I'd lean ConnectWise

The important distinction is that you don't just need a PSA that can invoice monthly. You need one that can maintain the relationship between:

subscription/contract → recurring revenue → service delivery → technician time → project work → project billing → client profitability.

ConnectWise PSA is particularly strong here. Its agreements support recurring billing and tracking contract utilization/profitability, while its project module handles project templates, milestones, time, expenses and project billing. It also supports subscription/usage billing and proration.

That makes it a good fit if, for example, a client looks like:

• $8,000/month managed services agreement
• $2,500/month software/cloud subscriptions
• $50,000 implementation project
• $175/hour out-of-scope consulting
• occasional fixed-fee projects

You can have those revenue streams coexist against the same customer and operational data rather than treating the business as either "subscription" or "projects."

Where I'd consider the alternatives

Autotask would be my second choice, particularly if you're heavily invested in the Datto/Kaseya ecosystem. It's a very mature MSP PSA and is strong around contracts, tickets, time, projects and billing. Community feedback in 2026 still frequently puts it alongside ConnectWise and Halo as the three major MSP PSA choices.

HaloPSA is the one I'd demo if user experience and configurability matter more than having the deepest legacy MSP ecosystem. It has a strong reputation among MSP operators, although implementation quality appears to make a big difference. Recent MSP discussions are notably polarized: some operators love its flexibility, while others report significant billing/configuration problems.

Accelo becomes interesting if by "managed services" you really mean recurring professional services/retainers rather than a conventional IT MSP. If your business is closer to "ongoing consulting + projects + retainers" than "help desk + RMM + contracts," I'd evaluate it seriously.

The bigger question I'd use to choose

I'd score each PSA against these six requirements, rather than starting with feature checklists:

1. Recurring revenue management — contracts, subscriptions, usage, minimums, overages, price increases.
2. Project accounting — fixed fee, T&M, milestones, retainers, budgets and WIP.
3. Unified time entry — one time entry should feed either the managed-service agreement or project billing.
4. Revenue/margin visibility — MRR, project margin, gross margin by client/service, utilization.
5. Quote-to-cash — sold subscription/project → provisioning/delivery → invoice without rekeying.
6. Accounting integration — clean handoff to your GL without turning the PSA into an accounting workaround.

If #1 and #2 are equally important, I'd start with ConnectWise PSA vs. Autotask vs. HaloPSA. ConnectWise explicitly positions its PSA as combining service delivery, contracts, billing and project management, with real-time client/team profitability reporting.

If you tell me roughly what your revenue mix is (e.g. 70% recurring / 30% projects), your accounting system (QuickBooks, NetSuite, Xero, etc.), and whether you're an IT MSP, cybersecurity provider, cloud/MSP, or broader professional services firm, I can narrow this to a top 2 and explain exactly how I'd structure the recurring + project revenue model in each.

Yes. For a managed-services business with both recurring subscription revenue and project-based revenue, I’d narrow the field to Autotask, ConnectWise PSA, and HaloPSA rather than a generic professional-services PSA.

My ranking

1. Autotask — my first choice for your model

Autotask has particularly strong support for the distinction you're describing: recurring services/contracts can generate recurring billing, while projects can be managed and billed separately. Its subscription functionality supports monthly, quarterly, semiannual and annual billing, and its recurring-service contracts can track labor against the recurring revenue.

That makes it a good fit if your revenue model looks something like:

• Managed services: $X/client/month
• Microsoft 365 / security / backup: recurring per-user/device subscriptions
• Support: included in the agreement or billed separately
• Projects: migrations, implementations, onboarding, upgrades
• Time & materials: outside-contract work
• Hardware/software: pass-through or marked-up charges

The big advantage is being able to bring those different revenue streams into the same operational system rather than treating your recurring business and projects as separate businesses.

2. ConnectWise PSA — strongest if you're scaling

ConnectWise is probably the other serious contender. Its PSA explicitly brings together time tracking, service desk, project management and automated recurring billing.

I'd lean ConnectWise over Autotask if you expect substantial complexity around projects, service delivery, integrations, sales, and operational reporting, particularly at a larger MSP.

3. HaloPSA — strongest modern alternative

Halo is worth a serious evaluation if you want something more flexible/customizable and don't want to be locked into the larger MSP ecosystems. Current comparisons generally put it alongside ConnectWise and Autotask as the leading dedicated MSP PSAs.

The important distinction

If by "subscription revenue" you mean true SaaS-style revenue recognition—e.g., bookings → deferred revenue → monthly revenue recognition → ARR/MRR/renewals—then I'd not assume a PSA should be your financial system of record.

A PSA is excellent at answering:

"What services does this client have, what should we bill them, what work did we perform, and how profitable was the engagement?"

Your accounting/ERP system should potentially answer:

"What revenue should we recognize this month, what is deferred, and what is the remaining contract obligation?"

That's an important distinction if you're growing toward sophisticated financial reporting.

What I'd choose

If you told me only what you've told me, I'd shortlist:

Autotask → ConnectWise PSA → HaloPSA

and I'd probably start the evaluation with Autotask.

The deciding factor would be how you structure your contracts. If you tell me (1) approximate number of customers, (2) % recurring vs project revenue, (3) whether you bill per user/device or fixed monthly contracts, and (4) what accounting system you use (QuickBooks, NetSuite, Sage, etc.), I can give you a much more specific recommendation and a side-by-side comparison of Autotask vs ConnectWise vs Halo for your exact revenue model.

Running a managed services model (MSP/hybrid) means your PSA needs to handle two fundamentally different economic engines under one roof:

• The Recurring Revenue Engine: Predictable, contract-bound subscription billing (monthly retainers, per-user, or tier-based agreements) that auto-renews.
• The Project-Based Engine: Variable, milestone- or time-and-materials-based (T&M) work (migrations, implementations, ad-hoc consulting) that requires strict budget tracking and resource allocation.

The market splits depending on whether you lean closer to Managed IT/Infrastructure Services or Professional/Consulting Services.

Top PSA Recommendations for Hybrid Revenue

1. Accelo (Best for Service-and-Project-Heavy Hybrid Models)
   • Why it fits: Accelo is built entirely around a quote-to-cash architecture that explicitly treats Retainers (Recurring Subscriptions) as a core object alongside Projects and Tickets. It allows you to draw down hours or dollars from a recurring monthly agreement, track project milestones separately, and seamlessly transition from a project phase into a recurring maintenance retainer.
   • Strengths: Excellent automated time-tracking, native CRM/sales pipeline, and robust profitability reporting on both fixed-price projects and ongoing subscription caps.
2. HaloPSA (Best for Modern Service Desk & IT-centric MSPs)
   • Why it fits: Originally a powerhouse in IT service management, HaloPSA handles recurring contract and agreement billing exceptionally well while providing a fully featured project management module. If your recurring revenue is tied to tickets, SLAs, and asset monitoring, HaloPSA bridges recurring agreements and project work without feeling clunky.
   • Strengths: Rapidly growing market share, incredibly modern interface, powerful contract/SLA billing automation, and transparent pricing compared to legacy enterprise options.
3. ConnectWise PSA (The Enterprise Standard for IT MSPs)
   • Why it fits: ConnectWise is the historic heavyweight for managed IT. Its "Agreements" module is designed specifically to automate recurring monthly bill runs (managed services) while running separate project work orders, change orders, and T&M billable hours in the project module.
   • Strengths: Deep ecosystem integrations, highly mature contract-billing rules, and comprehensive reporting.
   • Tradeoffs: High configuration complexity, steep learning curve, and rigid multi-year, quote-based contracts.
4. Scoro (Best for Financial-First & Agency-Style Hybrid Operations)
   • Why it fits: Scoro approaches a PSA from a strict financial and work-management angle. It excels at recurring invoicing (repetitive billing profiles) and complex project budgeting side-by-side.
   • Strengths: Real-time margin and budget burn tracking at the project and role level, comprehensive financial dashboards, and solid quote-to-invoice automation.

Quick Comparison Matrix

• Accelo: Best for digital/IT agencies balancing project work with strict monthly retainer hours.
• HaloPSA: Best for IT/ MSP operators wanting modern ticketing, SLAs, and contract billing combined with projects.
• ConnectWise PSA: Best for scaled, traditional MSPs deeply embedded in the IT channel ecosystem.
• Scoro: Best for data-driven operations leaders who want executive-level financial visibility over margins.

To help narrow down the ideal platform, tell me:

• What percentage of your revenue is recurring vs. project-based?
• Do you currently use an RMM (Remote Monitoring and Management) tool that needs native integration?

Managing both recurring subscription revenue (managed services/retainers) and project-based revenue (implementations, migrations, ad-hoc scopes) requires a PSA with robust contract/agreement management alongside strong project accounting and time-tracking.

The best choice depends heavily on whether you operate as an IT Managed Service Provider (MSP) or a general professional services/consulting firm , as the software ecosystem splits cleanly down those lines.

Category 1: Best for IT & Managed Services Providers (MSPs)

If your recurring revenue is tied to device counts, user seats, or IT service contracts, you need a PSA that handles agreements natively and blends them with project phases.

• HaloPSA — Widely considered a top modern choice for growing and mid-market teams. It provides exceptional transparency in pricing, incredible workflow configuration depth, and tightly integrates recurring agreement billing with standard project task and time tracking.
• ConnectWise PSA — The gold standard for enterprise-scale IT solution providers. Its "Agreements" module is deeply powerful for recurring billing structures, letting you bundle recurring fees, block hours, and project milestones under one client roof. Consideration: Steeper learning curve and legacy interface weight.
• Datto Autotask PSA — Highly tailored for managed services workflows, Autotask excels at converting recurring contract rules and project milestones into streamlined, automated monthly invoicing.
• *SuperOps * — A great next-generation, AI-assisted platform if you want a clean interface combining modern PSA and RMM workflows without the bloat of legacy enterprise toolsets.

Category 2: Best for Agencies, Consultancies, and Professional Services

If your "subscription" revenue is structured more like a monthly retainer or fixed-fee advisory block rather than IT infrastructure monitoring:

• Accelo — Excellent for quote-to-cash workflows that bridge retainers/recurring service agreements with complex project work. It treats the entire client lifecycle linearly, making it seamless to transition a client from a recurring retainer into a distinct project.
• Scoro — Built specifically for financial-first operations. It unifies quoting, recurring billing, project budgeting, and real-time margin tracking into a single dashboard so you can see exact profitability burn rates across both recurring and project streams.
• Kantata — Best-in-class for larger, resource-heavy professional services organizations that need deep forecasting, utilization metrics, and enterprise-grade project accounting.

Core Features to Evaluate in Your Demo:

1. Agreement vs. Project Flexibility: Can the platform cleanly bill a flat monthly subscription and bill project hours via time-and-materials or fixed milestones on the exact same invoice?
2. Accounting Integration: How smoothly does it sync differential revenue types (deferred/recurring revenue vs. recognized project revenue) into QuickBooks, Xero , or NetSuite?
3. Scope Creep Visibility: Does it alert you when project-based work bleeds into what should be covered (or not covered) by the recurring support tier?

To help narrow down the ideal platform, tell me:

• Are you managing IT/infrastructure assets (requiring an RMM connection) or pure professional services/consulting?
• Roughly how many team members will be logging time and using the system?

If your business is a true managed services provider with monthly recurring revenue (MRR) plus implementation and consulting projects, I'd prioritize the PSA's contract and billing engine over its project management features. Almost every PSA can manage projects; far fewer handle recurring contracts without constant manual work.

Here's how I'd rank the major options:

Industry analysts consistently place HaloPSA, ConnectWise PSA, and Autotask at the top when recurring agreements, mixed billing models, and project profitability are the primary requirements.

Based on your description

If your revenue looks something like:

• 70–90% recurring managed services
• Microsoft licensing
• Security subscriptions
• Cloud services
• Monthly support agreements
• Plus implementation projects and migrations

then I'd narrow it to HaloPSA or ConnectWise PSA.

Both support:

• Monthly recurring contracts
• Per-user or per-device billing
• Usage-based billing
• Fixed-fee projects
• Time & materials
• Change orders
• Procurement
• One invoice combining recurring services and project work
• Agreement profitability reporting

Those capabilities are exactly what MSP-focused PSAs are designed around.

My preference today

For most MSPs between roughly 10 and 150 employees, HaloPSA has become a strong choice because it combines deep billing capabilities with modern workflows and extensive customization, without some of the complexity and licensing costs associated with legacy enterprise PSAs.

One thing many MSPs overlook

The PSA should not be your system of record for subscription products.

A more scalable architecture is:

• CRM → Opportunities and quotes
• PSA → Tickets, projects, contracts, recurring billing
• Accounting → GL, AR, revenue recognition
• Subscription management (if applicable) → Microsoft CSP, SaaS licenses, cloud subscriptions

That separation makes renewals and billing much easier as recurring revenue grows.

A couple of questions would help narrow the recommendation further:

1. Approximately how many employees or technicians do you have?
2. What accounting system do you use (QuickBooks Online, Sage Intacct, NetSuite, etc.)?
3. Are your recurring subscriptions primarily Microsoft CSP licensing, your own managed services, or a mix of multiple SaaS vendors?

For an MSP or managed services firm with both recurring MRR and project work, I'd prioritize the PSA's contract and billing engine over its ticketing features. Most PSAs handle tickets well; far fewer handle recurring billing, prepaid hours, project billing, and renewals elegantly.

Here's how I'd rank the major options today:

If recurring revenue is your primary business model

I'd lean toward HaloPSA.

It excels at:

• Monthly recurring service contracts
• License and subscription billing
• Prepaid support blocks
• Fixed-fee managed agreements
• Usage-based billing
• Project invoices that coexist with recurring invoices
• Highly customizable workflows

Many MSPs moving away from older PSAs cite Halo's flexibility, though they also note that it requires a significant implementation effort to configure well.

If you're a larger, process-heavy MSP

ConnectWise PSA is still arguably the benchmark if you have:

• multiple service teams
• procurement
• project managers
• complex SLAs
• sophisticated finance requirements

Its contract and billing engine is extremely capable, but it comes with more administrative overhead and generally works best for organizations with established operational processes.

If projects are a major revenue stream

Look for:

• project budgets
• milestone billing
• T&M billing
• fixed-fee projects
• resource scheduling
• utilization reporting
• WIP tracking

HaloPSA and ConnectWise are generally stronger here than the lighter-weight platforms.

One thing I'd optimize for

If your business looks like:

• 70–90% recurring managed services
• 10–30% projects

then your PSA should make recurring billing essentially automatic. Projects should feel like an extension of the customer account—not a separate financial process.

The best implementations have:

• one customer record
• one contract
• monthly recurring invoices
• project invoices generated from the same account
• all costs, time, licenses, and profitability visible together

That gives you clear gross margin reporting by client instead of splitting data across multiple systems.

My recommendation

If I were selecting a PSA today:

• HaloPSA — Best overall balance of recurring billing, projects, automation, and customization for most MSPs.
• ConnectWise PSA — Best for larger or highly mature MSPs with complex operational requirements.
• Autotask PSA — A strong choice if you're already invested in the Datto/Kaseya ecosystem and want tight integration.
• Syncro — Excellent value for smaller MSPs, especially when you want an integrated PSA and RMM, though it has less depth for complex project and billing scenarios.

If you can share:

• your team size (e.g. 10, 30, or 100+ employees),
• annual recurring revenue (roughly),
• accounting platform (QuickBooks, Xero, NetSuite, etc.),
• and whether you're an MSP, MSSP, or broader IT consulting firm,

I can narrow the recommendation to the platforms that best fit your operating model.

When running a hybrid managed services model that balances predictable, recurring subscription revenue (MRR/ARR) with dynamic project-based revenue (milestones, T&M, fixed-fee implementations), your Professional Services Automation (PSA) tool needs strong contract/agreement management alongside robust project accounting.

The top PSA contenders handling this duality effectively fall into distinct tiers depending on your MSP size, workflow maturity, and preference for legacy vs. modern infrastructure.

Top PSA Contenders for Hybrid Revenue Models

1. HaloPSA
   • Best For: Growing to mid-market MSPs (10–50+ technicians) wanting modern architecture and deep configuration without legacy drag.
   • Handling Recurring vs. Project: HaloPSA shines with flexible contract types. You can set up recurring billing agreements (per-user, per-device, or flat-rate retainers) that run seamlessly on autopilot while simultaneously spinning up milestone- or time-and-materials-based project boards for professional services.
   • Strengths: Transparent pricing, highly customizable ITIL-aligned workflows, and rapid feature updates.
2. ConnectWise PSA (formerly Manage)
   • Best For: Established, mature MSPs with complex operational structures and heavy data requirements.
   • Handling Recurring vs. Project: Its "Agreements" module is built specifically to anchor recurring managed services revenue, auto-renewals, and block-hour contracts, while its project module handles complex work breakdown structures (WBS), phase budgeting, and resource scheduling.
   • Strengths: Deep ecosystem integration and comprehensive quote-to-cash workflows, though it carries a steeper learning curve and legacy administrative weight.
3. Datto Autotask PSA (Kaseya)
   • Best For: Service-focused MSPs deeply embedded in or comfortable with the Kaseya/Datto ecosystem.
   • Handling Recurring vs. Project: Autotask provides robust contract management that pairs recurring service billing directly with service desk ticket metrics, alongside integrated project tracking where budget burn is visible in real time.
   • Strengths: Fast cloud performance and solid alignment between reactive agreement-based work and proactive project delivery.
4. SuperOps
   • Best For: Modern, agile MSPs looking for a unified RMM + PSA platform with a clean, intuitive UI.
   • Handling Recurring vs. Project: It bridges the gap by offering straightforward contract and ticketing workflows alongside lightweight project management, reducing the clutter found in older enterprise tools.
   • Strengths: Built-in AI features, faster onboarding, and a unified approach to monitoring and business management.
5. PSOhub
   • Best For: Hubspot-centric or contract- and project-led IT service providers.
   • Handling Recurring vs. Project: Uniquely strong at marrying recurring service contracts with predictive, milestone-driven project management and automated time-to-cash tracking.
   • Strengths: Exceptional self-driving time tracking and seamless integration if your CRM and front-end pipeline live in HubSpot.

Key Capabilities to Test During Your Evaluation

When running a demo with any of these vendors, look closely at these specific workflows:

• The Handoff from Sales to Project: Can a won project quote automatically convert into a project budget and active billing schedule without manual re-entry?
• Agreement Overages: How easily does the system handle a client on a recurring monthly contract who requests out-of-scope project work or extra billable hours? Does it flag the leakage immediately?
• Unified Invoicing: Can it cleanly combine your flat recurring monthly fee line items and the current month's project milestone or time-and-materials hours onto a single, professional client invoice?

If you can share your approximate team size and whether you are looking for an all-in-one RMM/PSA bundle or a standalone PSA , I can narrow down the best specific recommendation for your stack.

For a managed services model (MSP) needing to balance recurring subscription revenue with project-based billing, top PSA solutions in 2026 include ConnectWise PSA (formerly Manage), Rev.io , and Acronis Cyber Protect Cloud . These tools are designed to handle hybrid revenue models by combining automated monthly invoicing with robust project tracking, time tracking, and ticketing.

Here are the best options ranked by functionality for that specific hybrid model:

1. ConnectWise PSA (Top All-Rounder)

• Why it's best for Hybrid: Offers highly robust agreement management for recurring revenue (managed service contracts) while seamlessly integrating with their project management module to track hours, expenses, and project-based revenue.
• Key Strength: Automates monthly recurring invoicing (MRR) based on device counts, users, or agreements.

2. Rev.io (Best for Complex Billing)

• Why it's best for Hybrid: Specifically targeted at MSPs with complex recurring, usage-based, and one-time project billing.
• Key Strength: Excellent at automating billing for managed service contracts, allowing for seamless integration with RMM tools to adjust invoice amounts automatically as device counts change.

3. Acronis Cyber Protect Cloud (Best for Integrated Security/RMM)

• Why it's best for Hybrid: Combines native PSA capabilities (ticketing, project management, billing) with its RMM and security tools.
• Key Strength: Streamlines the delivery of cybersecurity services (recurring) alongside traditional projects by integrating the service desk with the billing engine.

4. Other Strong Contenders

• Accelo: Excellent for consolidating tools in smaller service organizations with a strong quote-to-cash focus.
• Productive.io: Strong choice for modern project management and tracking budget burn, which is crucial for profitable project-based work.

Key Features to Look For in 2026

• Agreement Automation: Ensuring the system automatically handles monthly subscriptions and adjustments.
• Time-to-Billing Sync: Ensuring project hours and ticket time are immediately billable.
• RMM Integration: Automatically updating subscription counts from your monitoring system to the invoice.

To help you choose the right one, could you tell me:

• Roughly how many employees do you have?
• Do you already use a specific RMM (remote monitoring) tool?
• Is your primary challenge billing accuracy or tracking project profitability?

If you're an MSP or managed services firm with both recurring managed services revenue (MRR) and project-based professional services, the PSA needs to do more than ticketing. It should handle:

• Recurring contract billing (fixed fee, per-user, per-device, consumption)
• Project budgeting, milestones, and profitability
• Time capture across contracts and projects
• Procurement and pass-through expenses
• Revenue recognition/accounting integrations
• CRM, quoting, and renewals

Based on those priorities, here's how I'd rank the leading options today.

HaloPSA is probably the strongest overall recommendation for most MSPs today. It has excellent recurring contract management while also supporting robust project management. Many firms moving off legacy PSAs cite its flexibility, modern interface, and deep billing customization as major advantages.

If your business is roughly:

• <$3M ARR: HaloPSA or SuperOps
• $3M–20M ARR: HaloPSA or ConnectWise PSA
• Enterprise MSP: ConnectWise PSA or Autotask PSA

One thing many MSPs underestimate

Don't optimize only for ticket management.

Your PSA ultimately becomes your financial operating system, so evaluate how well it answers questions like:

• Which customers are actually profitable?
• Which projects are overrunning budget?
• How much MRR is under contract?
• Which subscriptions renew next quarter?
• How much technician time is billable vs. included?
• Can one invoice contain:
  • Monthly managed services
  • Microsoft licensing
  • Azure usage
  • Hardware
  • One-time project work
  • Time & materials

The best PSAs make all of that routine rather than requiring manual spreadsheets.

If you're more of a consulting/MSP hybrid

If projects represent 40–60% of revenue rather than traditional MSP work, you might also look at platforms like Accelo or Kantata, which have stronger project accounting but are less MSP-centric. Many MSPs ultimately stay with HaloPSA, ConnectWise, or Autotask because of their deeper contract billing and ecosystem integrations.

If you can share:

• your annual revenue,
• number of engineers,
• whether you're Microsoft CSP/Pax8,
• and whether you're using QuickBooks, Xero, or NetSuite,

I can narrow the recommendation to the one that's likely to fit your operating model best.