I need an on-prem backup solution for 20+ VMs that's reliable and not crazy expensive. Any recs?

For ~20 VMs, I’d focus less on “cheapest backup software” and more on reliable restores + ransomware resilience. The good news is you don’t need a huge enterprise platform for this size. My shortlist:

My practical recommendations

If this is production/business-critical:

• Buy Veeam + a dedicated backup repository.
• Use:
  • Daily incremental backups
  • Weekly/monthly retention
  • Immutable storage if possible
  • A second copy offline or offsite

If you want “80–90% of Veeam for less money”:

• Look hard at NAKIVO. For 20 VMs it is often the sweet spot. Their subscription licensing can be per workload (VM), and their lower tiers target smaller environments.

Hardware layout I’d pair with it

For 20 VMs, I’d avoid putting backups on the same storage as production.

Example:

• Backup server: modest CPU, 32–64 GB RAM
• Storage: RAID6/RAIDZ2, sized for retention (often 2–4× your used VM data)
• 10GbE if you have large VM disks
• Separate backup credentials
• Immutable repository or offline copy

A simple 3-2-1 design:

1. Production VM storage
2. Local backup repository
3. Second copy (another site, removable storage rotation, or cloud)

A few details would change the recommendation:

1. Are the VMs on VMware, Hyper-V, Proxmox, or something else?
2. How much total VM data are we protecting (5 TB, 20 TB, 50 TB+)?
3. Do you need application-aware backups (SQL/Exchange/AD), or just full VM recovery?

For a 20-VM on-prem environment, you are in the sweet spot where enterprise-heavy tools like full-scale Commvault or Cohesity are massive overkills (and budget killers), but basic consumer/smb tools won't cut it. You want something bulletproof, quick to restore, and priced per socket or per VM without hidden extortion fees.

Here are the top three reliable, budget-conscious, on-prem recommendations:

1. • NAKIVO Backup & Replication : Widely considered one of the best value-for-money options on the market. It’s significantly cheaper than Veeam, extremely lightweight, deploys as a pre-configured virtual appliance (or installs on Linux/Windows/NAS), and handles incremental backups, instant VM boots, and ransomware protection seamlessly. You can check out their packaging on the Nakivo Backup & Replication site.
2. • Hornetsecurity Altaro VM Backup : Exceptionally user-friendly, built specifically for smaller-to-midsize environments and MSPs. It doesn't require a master's degree in storage architecture to set up, has a tiny footprint, and the pricing is very aggressive compared to legacy giants. Details are available on the Hornetsecurity Altaro VM Backup page.
3. • Veeam Data Platform (Essentials Edition) : The gold standard for reliability. While full Veeam can get pricey, Veeam offers an Essentials bundle specifically packaged for small environments (covering up to 20 or 50 workloads) at a heavily discounted bundle price compared to enterprise editions. If you want the absolute most robust community support, documentation, and instant recovery reliability, look at the Veeam Essentials tier.

To help narrow down which of these fits best, tell me:

• Are you running VMware vSphere/ESXi, Microsoft Hyper-V , or something else?
• Do you need local NAS/SAN target support only, or do you need to push a copy to an offsite/cloud location too?

For 20 on-prem VMs, you are in that sweet spot where you're a bit too big for free/basic tools, but you don't need a massive enterprise-tier budget either. You want something rock-solid, easy to manage on a single local target (like a NAS or a dedicated backup server), and priced per-socket or per-VM without bleeding cash.

Here are the top reliable and cost-effective on-prem recommendations for 20 VMs:

1. Nakivo Backup & Replication
   • Why it fits: Widely considered the best value-for-money alternative to the heavy hitters. It's fast, lightweight, supports incremental forever backups, ransomware protection (immutable storage), and has a very intuitive web interface.
   • Cost factor: Significantly cheaper per VM than Veeam, and you can deploy it as a virtual appliance, install it directly on a QNAP/Synology NAS, or run it on Linux/Windows.
2. Hornetsecurity VM Backup (formerly Altaro VM Backup)
   • Why it fits: Built specifically for small-to-midsize environments (SMBs). It is famously easy to set up—you can literally have your 20 VMs backing up within 30 minutes. It doesn't have a million confusing enterprise knobs, it just works.
   • Cost factor: Very competitive subscription or permanent licensing model, making it ideal if you want predictable, low overhead.
3. Veeam Backup Essentials
   • Why it fits: The gold standard for reliability. If you ever need to restore at 3 AM, Veeam's recovery reliability is unmatched. Essentials is packaged specifically for businesses with under 50 workloads (sold in bundles of 5 VM packs).
   • Cost factor: It can creep up in price compared to Nakivo or Altaro, but if you hunt for a standard promotional price or packaged bundles via a reseller, it's usually worth the peace of mind. Check details on the Veeam Backup Essentials page.
4. Proxmox Backup Server (If using Proxmox VE)
   • Why it fits: If your 20 VMs happen to run on Proxmox VE, you already have an incredible, enterprise-grade, open-source-based backup solution available. It features incredible client-side deduplication, incremental backups, and verified data integrity.
   • Cost factor: Free if you self-manage it, with low-cost commercial support subscriptions available if you need enterprise backing.

To help narrow this down, let me know:

• What hypervisor are you running (VMware ESXi, Hyper-V, Proxmox, etc.)?
• Do you prefer a perpetual license or a subscription?

For 20 VMs, I’d shortlist Veeam, NAKIVO, and UrBackup. The sweet spot depends heavily on whether you’re running VMware, Hyper-V, or something else.

1. 🥇 Veeam Data Platform Essentials

For 20 VMs, this is probably where I'd start. Veeam's Essentials package is specifically aimed at small businesses and licenses workloads in 5-license increments, up to 50 workloads. Current published MSRP is $95/workload/year, so 20 workloads is roughly $1,900/year MSRP before any reseller discounts.

It gives you the mature Veeam backup/recovery ecosystem without necessarily buying the much heavier enterprise package.

I'd choose it if: these VMs are business-critical and you want something your IT team can trust without spending weeks engineering the backup system.

2. 🥈 NAKIVO

NAKIVO is probably the first alternative I'd price against Veeam. Its Pro Essentials edition is explicitly designed for smaller environments and supports up to 50 workloads, with licensing available as subscription or perpetual.

For a 20-VM environment, it's worth getting an actual quote because NAKIVO can be very competitive on total cost, particularly if you don't need all of Veeam's ecosystem.

3. 🥉 UrBackup — if "not expensive" means really inexpensive

UrBackup is open source and free for commercial use. It supports Windows and Linux, image and file backups, incremental image backups, a web UI, and bare-metal-style image restoration.

I'd be more cautious about making it my only backup system for 20 production VMs, though. It's a very different proposition from Veeam/NAKIVO in terms of enterprise VM integration and operational tooling.

There's also an UrBackup appliance option with replication and cloud/S3 capabilities.

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What I'd actually build

For 20 VMs, I'd keep the architecture simple:

20 VMs → backup server/repository → separate/offline/immutable second copy

For example:

• Backup software: Veeam Essentials or NAKIVO
• Backup server: inexpensive dedicated server
• Primary repository: RAID/ZFS storage sized around your retention requirements
• Secondary copy: another NAS/server, removable storage, or immutable object storage
• Retention: e.g. 14–30 daily + weekly/monthly longer-term copies
• Encryption: enabled
• Regular test restores: absolutely essential

The important thing is not to treat the backup server as the only copy. Veeam's current guidance emphasizes the 3-2-1-1-0 model, including an immutable/offsite copy.

My ranking for your situation

If I were spending my own money:

1. Veeam Essentials — safest recommendation for 20 production VMs.
2. NAKIVO — potentially better price/performance if the quote comes in substantially lower.
3. UrBackup — excellent if budget is the overriding concern and you're comfortable owning more of the operational risk.

If you tell me VMware vs Hyper-V vs Proxmox, approximate total VM storage (e.g. 5 TB/20 TB), and how many days of retention you want, I can size the backup server/storage and give you a realistic hardware + software budget for the 20 VMs.

For 20 VMs on-prem, you are in the sweet spot where you don't need an enterprise-tier budget, but you definitely need something more robust than consumer tools.

The top reliable and cost-effective recommendations for an environment your size include:

• Veeam Backup Essentials (Universal License) : This is the industry standard for a reason. Veeam packages their Essentials tier specifically for businesses with under 50 workloads. You can license exactly 20 instances (covering your 20 VMs), and it handles incremental backups, instant VM recovery, and immutability easily. Pricing for a 20-instance pack generally runs around $1,500 to $1,800 per year depending on your reseller and support tier—making it remarkably affordable for how bulletproof it is. You can scope details out on the Veeam Backup Essentials page.[1]
• Proxmox Backup Server (PBS) : If you happen to be running on Proxmox VE (or even if you aren't, though it integrates best there), Proxmox offers their backup server completely free and open-source (with optional enterprise support subscriptions if you want an official SLA). It features incredible client-side deduplication, authenticated encryption, and incremental backups. If budget is your absolute main constraint and you want enterprise-grade features for $0 in software licensing, check out Proxmox Backup Server.
• Synology Active Backup for Business : If you already have a high-capacity rackStation or a beefier Plus/Enterprise-series Synology NAS sitting in your rack, you might already own your backup software. Active Backup for Business is built right into DSM, is entirely free of licensing fees, and natively supports agentless backup for VMware vSphere, Microsoft Hyper-V, and physical servers. It's surprisingly polished, dead-simple to set up, and reliable for 20 small-to-medium VMs.
• N-able Cove Data Protection or Hornetsecurity (Altaro): Altaro VM Backup (now part of Hornetsecurity) is famous for being incredibly lightweight, straightforward, and significantly cheaper/easier to manage than heavy enterprise suites, with a very predictable per-VM subscription model.

To help narrow down the best fit, tell me:

• What hypervisor are you running (VMware ESXi, Hyper-V, Proxmox, Nutanix)?
• Do you already have on-prem backup storage (like a NAS or a dedicated server), or do you need to budget for that too?

For 20 VMs, I’d shortlist these three:

1. Veeam — my default recommendation

Veeam is probably what I'd choose if these are VMware or Hyper-V VMs and you want something that's boring, proven, and easy for another admin to take over.

Veeam Essentials is currently listed at $95 USD per workload/license per year, sold in packs of five, so 20 VMs is roughly $1,900/year MSRP before reseller discounts/taxes. It includes backup, recovery, monitoring/reporting, and support for up to 50 workloads.

Why I'd pick it: mature ecosystem, excellent VM recovery, good ransomware-oriented features, and lots of people know how to operate it.

2. Proxmox Backup Server — cheapest serious option

If your hypervisor is Proxmox VE, this is the obvious answer. Proxmox Backup Server is purpose-built for this and supports incremental, deduplicated, encrypted backups, verification, remote sync, and live restore.

The software itself is free; paid subscriptions are based on backup-server count, not number of VMs. Current subscriptions start at €560/year per server for Community, with Basic at €1,120/year and Standard at €2,240/year.

For a 20-VM shop trying to keep costs down, a dedicated PBS box + lots of local disk + a second/offsite copy is a very compelling setup.

3. NAKIVO — worth getting a quote

NAKIVO supports VMware, Hyper-V and Nutanix and licenses VMs as individual workloads. Its Pro Essentials edition supports up to 50 workloads, so 20 VMs fits comfortably.

I'd put it on the quote list if Veeam's price comes back higher than you want.

What I'd actually build

For 20 VMs, I'd spend money on the backup storage and redundancy, rather than overspending on fancy backup software:

• 1 dedicated backup server
• ~12–24 TB usable storage, depending on VM size/retention
• RAID/ZFS with enough disks for your required capacity
• 10 GbE if your VM estate is sizable
• Daily incremental backups
• Weekly/monthly retention
• A second copy that's not continuously writable from the production environment
• Regular automated restore testing

That last point matters enormously: RAID is not a backup, and a backup repository that's permanently exposed to the same domain/admin credentials as production isn't a great ransomware defense.

My ranking: Veeam if you want the safest all-around commercial choice → Proxmox Backup Server if you're already on Proxmox and want maximum value → NAKIVO if you want a simpler/lower-cost commercial alternative.

If you tell me VMware vs Hyper-V vs Proxmox, total VM storage (e.g. 8 TB), and desired retention (e.g. 30 days), I can spec the actual backup server/disks and give you a rough hardware + software budget.

Why I'd pick it: mature ecosystem, excellent VM recovery, good ransomware-oriented features, and lots of people know how to operate it.

2. Proxmox Backup Server — cheapest serious option

If your hypervisor is Proxmox VE, this is the obvious answer. Proxmox Backup Server is purpose-built for this and supports incremental, deduplicated, encrypted backups, verification, remote sync, and live restore.

The software itself is free; paid subscriptions are based on backup-server count, not number of VMs. Current subscriptions start at €560/year per server for Community, with Basic at €1,120/year and Standard at €2,240/year.

For a 20-VM shop trying to keep costs down, a dedicated PBS box + lots of local disk + a second/offsite copy is a very compelling setup.

3. NAKIVO — worth getting a quote

NAKIVO supports VMware, Hyper-V and Nutanix and licenses VMs as individual workloads. Its Pro Essentials edition supports up to 50 workloads, so 20 VMs fits comfortably.

Yes. For 20 VMs, I’d shortlist these three:

1. Veeam — my default recommendation

Veeam is probably where I'd start if you're running VMware or Hyper-V.

It's extremely mature, has excellent VM recovery capabilities, immutable-backup options, replication, application-aware processing, and a huge amount of documentation/community knowledge.

The catch: Community Edition only covers 10 workloads, so your 20-VM environment would require a paid license.

For a 20-VM shop, I'd price Veeam against NAKIVO rather than assuming Veeam is automatically the cheapest.

2. Proxmox Backup Server — best bang for the buck

If you're already on Proxmox, this is my strongest recommendation.

proxmox.com is free to download/use, and it provides incremental, deduplicated, compressed and encrypted backups. It also supports backup verification, remote synchronization, and ransomware-oriented protections.

You can buy support/subscription separately; the current Community subscription is €560/year per backup server, with unlimited backup storage and clients.

For 20 VMs, I'd seriously consider:

Proxmox VE → dedicated Proxmox Backup Server → RAID/ZFS storage → second backup target/offsite copy

That gives you a very capable setup without a big licensing bill.

3. NAKIVO — worth getting a quote

NAKIVO is particularly interesting for a small/mid-sized environment because it supports VMware, Hyper-V, Nutanix, Proxmox, and physical machines. Its per-workload licensing counts one VM as one workload, with the smaller Essentials tiers covering 5–50 workloads.

So your 20 VMs fit nicely into that model.

What I'd actually deploy

For a cost-conscious 20-VM environment, I'd aim for:

• Backup server: dedicated physical box, not another VM
• Storage: ~2–4× the total protected VM data, depending on retention/change rate
• RAID/ZFS: RAIDZ2 or RAID10 depending on workload and desired performance
• Backups: daily incremental + weekly/monthly retention
• Second copy: another physical/NAS target or offsite location
• Immutable/offline copy: strongly recommended for ransomware
• Monitoring: backup-failure alerts plus periodic test restores

And don't make the mistake of treating a RAID array as your backup. RAID protects availability; backups protect data.

My ranking

If VMware/Hyper-V: 1. Veeam → 2. NAKIVO → 3. whatever came bundled with your storage

If Proxmox: 1. Proxmox Backup Server → 2. Veeam → 3. NAKIVO

If you tell me what hypervisor you're running (VMware, Hyper-V, Proxmox, etc.), roughly how much total VM storage you have (e.g. 5 TB/20 TB/50 TB), and your budget, I can give you a concrete $ hardware + software build for 20 VMs.

If you're already on Proxmox, this is my strongest recommendation.

proxmox.com is free to download/use, and it provides incremental, deduplicated, compressed and encrypted backups. It also supports backup verification, remote synchronization, and ransomware-oriented protections.

You can buy support/subscription separately; the current Community subscription is €560/year per backup server, with unlimited backup storage and clients.

For 20 VMs, I'd seriously consider:

Proxmox VE → dedicated Proxmox Backup Server → RAID/ZFS storage → second backup target/offsite copy

That gives you a very capable setup without a big licensing bill.

3. NAKIVO — worth getting a quote

NAKIVO is particularly interesting for a small/mid-sized environment because it supports VMware, Hyper-V, Nutanix, Proxmox, and physical machines. Its per-workload licensing counts one VM as one workload, with the smaller Essentials tiers covering 5–50 workloads.

So your 20 VMs fit nicely into that model.

What I'd actually deploy

For a cost-conscious 20-VM environment, I'd aim for:

For an on-prem environment of around 20 VMs , you want something that doesn't require an enterprise-sized budget or a dedicated storage engineer to configure. The sweet spot here is a lightweight, reliable SMB-focused solution that offers fast local recovery, deduplication, and straightforward pricing.

The top three recommendations that balance reliability with a sane price tag include:

• Nakivo Backup & Replication: Widely regarded as one of the best value-for-money options on the market. It’s resource-efficient, deploys easily (you can even run it right on a local NAS or a small VM), supports VMware, Hyper-V, Nutanix, and even Proxmox, and features built-in global data deduplication. Pricing is very competitive, often starting around $2.45 per workload/month for subscriptions or economical per-socket/per-VM perpetual options. You can review their tiers on the Nakivo Pricing Calculator.
• Veeam Data Platform Essentials: The industry gold standard for reliability. Veeam offers an "Essentials" bundle specifically packaged for small-to-midsize businesses with up to 50 workloads. It gives you all the enterprise-grade bulletproof reliability, instant VM recovery, and ransomware immutability of standard Veeam, but at a heavily discounted SMB price tier. It is licensed via Veeam Universal License (VUL), running roughly $95 per workload/year MSRP for the essentials bundle. Check out the details on Veeam Data Platform Essentials.
• Hornetsecurity VM Backup (formerly Altaro): Known for having one of the absolute simplest, most frustration-free management interfaces in the industry. It's built specifically for SMBs and IT generalists who don't want to spend hours troubleshooting backup chains. It handles compression and deduplication well, supports concurrent backups cleanly, and is priced per host or per VM without hidden modules. You can check configuration specifics via Hornetsecurity VM Backup.

To help narrow down the best fit, tell me:

• What hypervisor are you running (VMware vSphere, Microsoft Hyper-V, Proxmox, etc.)?
• Do you have an existing local backup target (like a NAS, a SAN, or a dedicated backup server with local disk)?

For 20 VMs, I’d avoid the very low-end “backup appliance” stuff and look at a few proven options. The sweet spot is usually a dedicated backup server + RAID/ZFS storage + immutable/offline copy if possible.

My shortlist:

What I’d probably deploy for 20 VMs

Option A: Best value (my usual recommendation)

• 1 dedicated backup server: - 8–16 cores
• 32–64 GB RAM
• RAID/ZFS storage (for example 8–12 HDDs)
• SSDs for metadata/cache if using ZFS
• Backup software: - NAKIVO if budget matters
• Veeam if downtime is expensive
• Retention: - Daily backups for 30 days
• Weekly backups for 3–6 months
• Monthly backups for 1 year
• Add a second copy: - USB disk rotation
• another site
• S3-compatible object storage

Option B: Cheapest reliable

• If you run Proxmox: - Proxmox Backup Server on a separate machine
• ZFS RAID storage
• replication to another box/site if possible Proxmox positions PBS as an on-prem and remote backup solution with integrated management.

Hardware budget ballpark

For 20 typical VMs, I’d expect:

• $2k–$5k for a decent backup server (depending heavily on storage size)
• $0–$3k/year for software/support depending on choice

I would not cheap out on:

• disks (use NAS/enterprise-class drives)
• RAID/ZFS layout
• restore testing
• ransomware protection (immutable backups or offline copies)

A few questions would change the recommendation:

1. What hypervisor are the 20 VMs on (VMware, Hyper-V, Proxmox, Nutanix)?
2. Total VM storage size (5 TB? 50 TB? more)?
3. Do you need application restores (SQL, AD, Exchange), or just whole-VM recovery?
4. Is this for a business where you need vendor support, or are you comfortable managing Linux/open-source?

For 20 VMs on-premises, you are in the sweet spot for SMB-targeted licensing—meaning you can avoid massive enterprise appliance costs (like Rubrik or Cohesity) while skipping clunky legacy software.

The top recommendations balancing rock-solid reliability and sensible pricing include:

• Veeam Backup Essentials (VDP Essentials): This is the industry gold standard for a reason. Veeam packages their robust enterprise engine into discounted 5-pack bundles specifically for smaller environments under 50 workloads. For Essentials, pricing typically hovers around a reasonable per-license cost (historically around $95–$150+ per VM/year depending on the exact tier/promos). It gives you bulletproof agentless backups, instant VM recovery, and easy replication. You can check details or request a quote on the Veeam Data Platform Essentials page.
• Nakivo Backup & Replication: Widely known as the budget-friendly disruptor to Veeam. Nakivo is exceptionally lightweight, deploys fast as a pre-configured virtual appliance, and handles change block tracking, instant recovery, and ransomware-resilient backups smoothly. It is usually significantly cheaper than Veeam while retaining high reliability for VMware/Hyper-V. Explore options on the Nakivo Backup & Replication site.
• Altaro VM Backup (now Hornetsecurity): If you are running Hyper-V or a smaller VMware setup and want something straightforward that won't require a dedicated storage engineer to manage, Altaro is famous for being intuitive, remarkably fast to set up, and aggressively priced for smaller VM counts.

To help narrow this down, let me know:

• What hypervisor are you running (VMware vSphere, Microsoft Hyper-V, Proxmox, Scale Computing)?
• What is your rough RTO/RPO (how fast do you need to spin things back up if a host dies)?

I can help you estimate rough licensing footprints or point out specific gotchas for your environment.