Ditch WhatsApp and Discord: Private Alternatives That Don't Harvest Your Data

Your messages might be encrypted, but that doesn’t mean they’re private.

If you’re using WhatsApp, Discord, Slack, or Instagram DMs, you’re trusting corporations with your conversations — corporations that have a track record of sharing your data, harvesting your metadata, or quietly rolling back the privacy features you thought you had. It doesn’t have to be this way. There are genuinely private, open source alternatives that are easy to set up and don’t cost you your privacy.

The Problem with WhatsApp

WhatsApp uses the Signal Protocol for end-to-end encryption — which is excellent. The problem isn’t the encryption. It’s everything else. Metadata — who you talk to, when, how often, from where — is collected and shared with law enforcement in real time. A leaked FBI training document confirmed that WhatsApp provides this data every 15 minutes via pen register.

And because WhatsApp is owned by Meta, that metadata feeds into the same advertising machine that generated over $200 billion last year. The content of your messages may be encrypted, but Meta knows exactly who you’re talking to and when. That’s worth more than you’d think.

Instagram Just Made Things Worse

If you’re still using Instagram DMs for anything sensitive, stop. Meta has removed end-to-end encryption from Instagram DMs entirely, citing low adoption of the opt-in feature. So your Instagram conversations are now fully readable — by Meta, by anyone who compromises their systems, and by any government that asks nicely enough.

Signal: The Gold Standard

If you want a direct replacement for WhatsApp, Signal is the answer. It’s built on the same encryption protocol WhatsApp uses — because Signal invented it — but without the metadata harvesting.

What makes Signal stand out:

• No phone number required — Signal now supports usernames, so you can communicate without sharing your number
• No data harvesting — there’s no commercial model, no advertising, no metadata collection
• Audio and video calls — works across all platforms, including Linux
• Private by default — disappearing messages, sealed sender, and no cloud backups unless you choose them

Signal is what WhatsApp would be if Meta didn’t own it. It’s the tool I recommend to anyone who asks me about private communication.

Replacing Slack and Discord

For team communication — whether that’s a business, a community, or a gaming group — there are solid open source alternatives to Slack and Discord that you can self-host, giving you full control over your data.

Rocket.Chat is probably the easiest to get started with. It’s got all the apps you need, supports end-to-end encryption, and feels familiar if you’ve used Slack. You can self-host it or use their cloud offering. For businesses worried about data sovereignty, self-hosting means your conversations stay on your infrastructure.

Matrix (via the Element client) is the grandaddy of decentralised, encrypted chat. It’s federated — meaning anyone can run a server that connects to the wider network, much like email. Some rooms may not be encrypted by default, but it’s easily configured. Matrix is the choice if you want maximum control and don’t mind a slightly steeper learning curve. It’s compartmentalisation for your communications.

Voice Chat Without the Surveillance

If you just need voice chat — for gaming, for quick team calls, for keeping a group connected — there are options that don’t require handing over your identity to a corporation.

TeamSpeak is the grandaddy of game-related voice chat. It’s free, you can run your own server, and it works on Windows, Mac, and Linux. No accounts, no data harvesting, no algorithmic feeds trying to keep you engaged.

Mumble is the fully open source alternative — low latency, self-hostable, and built for privacy. If you want voice chat with zero commercial strings attached, Mumble is it.

A Word of Caution

There are dozens of smaller, more obscure messaging apps out there. My advice: stick with the bigger names. Signal, Matrix, Rocket.Chat, TeamSpeak, Mumble — these have active communities, regular security audits, and a track record. An obscure app with three developers and no audit history might sound appealing, but it’s a risk you don’t need to take when proven alternatives exist.

And whatever you do, don’t assume that because a platform says “encrypted” it means “private.” As we’ve seen with WhatsApp, the encryption can be solid while the metadata tells the whole story. True privacy means minimising what’s collected in the first place — not just scrambling the contents.

The Bottom Line

The tools to communicate privately exist, they’re free, and they’re easier to use than ever. You don’t need to hand over your conversations to Meta, Microsoft, or any other corporation that treats your data as a revenue stream. Whether it’s Signal for personal messaging, Rocket.Chat or Matrix for team communication, or Mumble for voice chat — the alternatives are there. You just have to choose them.

What’s Your Experience?

What are you using for private communication? Have you made the switch from WhatsApp or Discord, or are you still weighing up the options? Leave a comment below or share your setup on social media.

If you’d like help choosing the right communication tools for your business — or setting up self-hosted alternatives that keep your data under your control — hit the “Let’s talk” button and book a free explorative call.

Axel Segebrecht is founder and director of Be Braver Ltd, a UK-based technology consultancy specialising in digital sovereignty, self-hosted infrastructure, and FOSS migration for European businesses.

Photo by Alicia Christin Gerald on Unsplash