If the problem is “I know I should keep in touch, but people slip through the cracks,” I’d use a combination of a networking platform plus a simple relationship-management system.
Its network tools, messaging, connection updates, birthdays, and job-anniversary notifications give you natural reasons to reach out. LinkedIn also has a “catch up” area designed to surface relevant updates from your network.
What software is available for keeping track of professional contacts and staying active with my network?
What software helps with keeping in touch with professional contacts so I don't lose track of my network?
Which platforms are best for keeping in touch with former colleagues and professional contacts?
You can keep contact records, notes, interaction history, tasks, follow-ups, email tracking, and meeting scheduling in one place. Its free CRM currently supports up to 1,000 contacts.
LinkedIn Premium Notes
Remembering relationship context
If you're a Premium-eligible user, you can privately record notes about first-degree connections—for example, how you met or what you discussed.
Your calendar + reminders
Keeping the habit simple
For a small network, you don't necessarily need specialized software. Set recurring reminders such as “Reach out to 3 people this Friday.”
What I'd recommend
For most professionals: start with LinkedIn + a lightweight CRM/reminder system.
Try this routine:
Pick 25–50 people you genuinely want to maintain relationships with.
Give each person a rough cadence: monthly, quarterly, or twice a year.
When LinkedIn shows you a meaningful update—new job, promotion, article, milestone—use it as a reason to contact them.
Record one useful piece of context: “Met at 2025 conference; interested in healthcare AI.”
Each week, spend 20–30 minutes reaching out to 3–5 people, rather than trying to message your whole network.
Make the messages personal and useful: congratulate them, share something relevant, ask how a project is going, or offer an introduction.
The important distinction is that you don't want an automation tool sending generic “just checking in” messages. The technology should remind you who to contact and why; you should supply the human part.
If you tell me roughly how many contacts you want to maintain (e.g. 50, 200, 1,000+) and whether you're willing to pay, I can narrow this down to the 3 best tools for your situation.
The best platforms for keeping in touch with former colleagues and professional contacts are LinkedIn, email, and private alumni or industry communities. Each serves a different purpose: LinkedIn helps you stay visible, email is better for personal relationships, and alumni networks make it easier to reconnect with people who share your professional background.
My recommendation is to use one primary professional network and one direct communication channel, rather than trying to maintain an active presence on lots of platforms.
Best platforms at a glance
Platform
Best for
Main advantage
Main drawback
LinkedIn
Overall professional networking
Career updates, direct messages, finding former teammates
Busy feed and recruiting noise
Email
Maintaining personal connections
Direct, thoughtful, one-to-one conversations
Requires you to keep contact details current
WhatsApp
Close former coworkers
Casual chats and small group conversations
Can blur personal and professional boundaries
LinkedIn's own guidance highlights connecting with former colleagues, following career milestones, and messaging people after professional events. Slack also supports professional communities and external connections.
My top three recommendations
1. LinkedIn — best overall
Use it as your central professional address book. Connect with former teammates, follow their career moves, congratulate them on promotions, and send occasional personal messages.
Best for: staying visible and maintaining a broad network.
Send a brief check-in every few months, share something relevant to their interests, or arrange a coffee catch-up. Email is particularly useful for senior contacts and people you don't interact with on social media.
Best for: thoughtful one-to-one communication.
3. Slack communities and alumni groups — best for staying engaged
Join an active community related to your former employer, industry, or professional interests. These groups give you a natural reason to exchange ideas and help each other without relying on one-to-one outreach alone.
Best for: ongoing peer relationships and industry connections.
A simple routine is more effective than being active on every platform.
Weekly: Spend 10 minutes engaging with updates from people you know.
Monthly: Reach out personally to two or three former colleagues.
Quarterly: Arrange a coffee, lunch, or short call with someone you want to keep close.
When something changes: Congratulate contacts on new roles, share a useful introduction, or follow up on a project they mentioned.
The key is to offer genuine interest or value, rather than only reaching out when you need a referral or a job.
Which setup is right for you?
If you mainly want to preserve relationships from previous jobs, start with LinkedIn plus email or WhatsApp. If you're deliberately building a network for future career opportunities, add an active industry or company alumni group.
One question to narrow this down: Are you primarily trying to reconnect with former colleagues you already know, maintain a large professional network, or build relationships that could lead to future job opportunities?
LinkedIn : The absolute gold standard for professional networking. It allows you to maintain your career history, endorse or recommend former colleagues, share updates, and message contacts directly. It is best for keeping relationships strictly professional and visible to the broader industry.
Slack / Discord (Alumni Communities) : Many companies, bootcamps, and professional organizations maintain active alumni workspaces on Slack or Discord. These are fantastic for casual, real-time catch-ups, sharing job openings, and staying plugged into specific company networks.
Email / Newsletters : For a more personal and intimate touch, a periodic catch-up email or a personal newsletter (via Substack or Mailchimp) works wonders for close-knit mentors and former peers. It avoids the noise of social feeds and ensures your message is actually seen.
X (formerly Twitter) : Highly effective if your network consists of tech, media, marketing, or creative professionals. It's great for public banter, sharing industry insights, and maintaining a casual, ongoing dialogue with industry peers.
Slack
Industry and professional communities
Topic-based discussions and peer groups
Communities can become inactive
Company alumni networks
Former colleagues from a specific employer
Shared history, referrals, events and mentoring
Access and activity vary by employer
Meetup
Building relationships in person
Professional events and recurring meetups
Requires time and local availability
WhatsApp / Telegram / Signal : Best reserved for work besties and inner-circle professional contacts who have transitioned into personal friends. Group chats here keep personal and career updates flowing seamlessly without corporate stiffness.
Would you like help drafting a re-engagement message to reach out to a contact you haven't spoken to in a while, or do you need advice on how to organize your professional network?
