Free Alternative to WhatsApp

I have used Signal for years. It is the only messaging app I trust completely with my data. I tested version 7.11 on my M3 MacBook Pro. The desktop client is an Electron wrapper. It consumes about 400MB of RAM while idling. That is heavier than a native app. The privacy guarantees make the memory footprint worth it. The Signal Protocol is open source. It forces end-to-end encryption on every single message. You link your Mac by scanning a QR code on your phone. The desktop app does not pull in your old chat history. That is a deliberate security choice by the developers. It means your Mac starts with a blank slate. I found the voice and video calls to be surprisingly stable. They connect faster than they did a year ago. The interface is painfully basic. You will not find animated stickers or gaming integrations here. It just sends text and files securely.

Telegram provides the best user experience on macOS. I tested version 10.14. It is written natively in Swift. It uses barely 100MB of RAM. The scrolling is incredibly fluid. It handles massive 2GB video files without choking. I love the interface. It feels like a proper Mac app. But you have to understand the security model. Telegram does not use end-to-end encryption by default. Your messages live on their servers. You have to manually start a Secret Chat for encryption. Those Secret Chats do not sync to the Mac desktop client. That is a massive limitation for privacy advocates. The platform is excellent for large communities. You can join groups with hundreds of thousands of members. The search functionality is lightning fast. I found a specific PDF from three years ago in about two seconds. The app includes chat folders to organize your conversations. I use this to separate work channels from personal friends. It is a fantastic piece of software. You just have to trust Telegram's server operators.

Element is the flagship client for the Matrix protocol. I tested version 1.11.60. It operates exactly like email. You can register an account on the main Matrix server or host your own. Your account can talk to anyone on any other Matrix server. The decentralization is brilliant. The execution is occasionally frustrating. The desktop app is an Electron wrapper. The interface feels like a web app from 2018. Setting up a new device requires a process called cross-signing. You have to verify your Mac using your phone to unlock your encrypted message history. I failed the verification process twice before it finally worked. Once it is running, it handles text and images perfectly. It supports massive chat rooms. Many open-source projects use Element instead of Discord or Slack. The voice calling works through Jitsi integration. It is not as stable as Signal. I recommend Element if you want to run your own server and own your data completely.

Session takes privacy to an extreme level. I tested version 1.18. It does not ask for your phone number. It does not ask for an email address. You generate a randomized Session ID when you open the app. You share that long string of characters to connect with people. The network routes your messages through an onion routing system powered by the Oxen Service Node Network. No single server knows both the sender and the receiver. This architecture causes a noticeable delay. I found that text messages take three to five seconds to deliver. Image uploads can take up to thirty seconds. The desktop app is clean and easy to read. It lacks advanced features like voice calling or status updates. You can only send files up to 10MB. Session is clearly designed for high-risk environments. It is overkill for chatting with your mom. But if you need an entirely anonymous communication channel, this is the best option available on macOS.

Delta Chat is the most fascinating app on this list. I tested version 1.44. It looks and acts exactly like a traditional messaging app. But it does not have its own servers. It uses your existing email account. You log in with your IMAP and SMTP credentials. When you send a chat message, it actually sends a brief email to the recipient. If they have Delta Chat, it shows up as a chat bubble. If they do not, it just appears in their regular email inbox. This solves the biggest problem of moving away from WhatsApp. You do not have to convince the other person to download the app. You just need their email address. It supports Autocrypt end-to-end encryption automatically if both parties use the app. I found it perfectly reliable for text. Sending large video files is a bad idea because most email providers cap attachments at 25MB. The setup requires generating an app-specific password if you use Gmail or iCloud.

Wire used to be my favorite alternative to WhatsApp. I tested version 3.35. The interface is gorgeous. It uses a very clean, minimalist design language. It supports end-to-end encryption, high-quality audio calls, and easy file sharing. The company is based in Switzerland. They comply with strict European privacy laws. The problem is their business model. Wire pivoted hard toward enterprise customers a few years ago. The free personal tier still exists, but they hide it on their website. The desktop app frequently reminds you about premium features. I noticed that syncing messages between my iPhone and Mac sometimes requires a manual refresh. The audio quality on calls is exceptional. It handles poor network conditions better than Signal. I still recommend Wire for small teams who want a secure alternative to Slack. For casual personal use, the enterprise focus makes it feel a bit abandoned by the developers.

Jami is a completely peer-to-peer messaging tool developed by Savoir-faire Linux. I tested the 2024 release. It operates without any central servers. Your Mac connects directly to the device of the person you are messaging. This makes it impossible for an authority to shut down the network. It relies on a distributed hash table to locate other users. The desktop app is functional but rough around the edges. I found that it takes a few seconds to establish a connection when initiating a call. Once connected, the video quality is decent. The biggest drawback is battery life. Maintaining a peer-to-peer node on your Mac consumes more background power than a typical client-server app. File transfers happen directly between devices, which means both of you have to be online at the exact same time to send a photo. It is a fascinating technical achievement. I keep it installed for emergencies, but I do not use it for daily conversations.

SimpleX Chat drops the concept of user accounts entirely. I tested version 5.8. It does not use phone numbers, emails, or even randomized IDs. You create a unique, single-use connection link for every person you want to talk to. Once you scan their QR code, the app establishes a secure tunnel. The network only knows that two anonymous endpoints are passing encrypted packets. The desktop experience is split. You can use a terminal-based CLI or a newer graphical interface. I tested the GUI. It is very basic. It feels like an early beta. Managing multiple connections requires keeping track of who is who, since the app has no central contact list to pull from. I found the file transfer speeds to be surprisingly fast. The lack of any global identifier makes this the most private app on the market right now. It is difficult to explain to average users, but security researchers love it.

I included Viber because over a billion people use it globally. I tested version 22.8. It is a massive, heavy application. The desktop client installs quickly but immediately bombards you with sticker markets, public communities, and advertisements. It uses end-to-end encryption by default for one-on-one chats. The encryption protocol is proprietary, so independent researchers cannot verify it easily. I found the desktop app to be surprisingly fast despite the visual clutter. The voice calling feature, Viber Out, allows you to call landlines for a fee. This makes it a decent Skype replacement. Syncing between the phone and the Mac works reliably. I hate the interface. It is filled with purple accents and annoying notification sounds. It is practically the opposite of Signal's clean design. If your family overseas refuses to use anything else, the Mac client is stable enough to keep running in the background. I just keep it permanently muted.