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Best Free & Open Source Alternatives to Fathom

Compare 2 open-source Fathom alternatives including Speakr and Tachyon Transcripts

If you're looking for the best open-source alternative to Fathom, Speakr is a strong place to start. If it doesn't quite fit your needs, there are plenty of other great options worth exploring, including Tachyon Transcripts. We've ranked the top alternatives to help you compare your options and find the right fit.

#1 Speakr

Speakr

Self-hosted AI transcription and intelligent note-taking platform that turns audio recordings into organized, searchable notes with speaker identification.

Speakr is a personal, self-hosted web application for transcribing audio recordings into organized, searchable, and intelligent notes. It uses AI for high-accuracy transcription with speaker identification, voice profiles powered by voice embeddings, and an interactive chat interface that lets you ask questions about your recordings.

Speakr supports multiple transcription backends including OpenAI Transcribe (with diarization), self-hosted WhisperX ASR, Mistral Voxtral, and VibeVoice ASR — giving you full control over where your data goes. It offers a comprehensive REST API with Swagger UI, SSO authentication via any OIDC provider (Keycloak, Azure AD, Google), internal and public sharing with granular permissions, group management, smart tagging with custom AI prompts and tag stacking, auto-deletion with flexible retention policies, and full internationalization across six languages.

Built with Python/Flask and Vue.js 3 with Tailwind CSS, Speakr runs entirely on your own infrastructure using Docker, ensuring your sensitive conversations remain completely private. Additional features include audio-transcript synchronization with click-to-seek, semantic search across all recordings (Inquire Mode), customizable export templates for Obsidian and Logseq, incognito mode for session-only processing, and support for both SQLite and PostgreSQL.

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#2 Tachyon Transcripts

Tachyon Transcripts

100% local Windows meeting transcription tool with real-time captions, speaker diarization, and offline Whisper processing.

Tachyon Transcripts is a fully local, Windows-only meeting transcription application that captures both microphone and system audio in real time, transcribes speech using OpenAI Whisper, and displays live closed captions without sending any data to the cloud.

The tool uses WASAPI loopback to capture dual audio streams — your microphone and any system output — keeping them as separate channels for reliable speaker labelling and clean post-processing. It features a transparent, always-on-top caption overlay that can be toggled with a global hotkey, and automatically selects the optimal Whisper model based on your GPU (large-v3 on high-end NVIDIA cards, medium on smaller GPUs, or a distilled CPU-friendly model as fallback).

After recording, you can re-transcribe sessions offline with higher accuracy settings including beam search, voice activity detection, crosstalk suppression, and speaker diarization using SpeechBrain, pyannote, or Resemblyzer. All transcripts are saved as timestamped Markdown files alongside the original audio recordings.

Everything stays on your machine — no telemetry, no analytics, no cloud services. The only outbound request is the first-time model download from HuggingFace, which can be pre-cached during installation.

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Frequently Asked Questions

Are there any open source alternatives to Fathom?

Yes, there are 2 open source alternatives to Fathom. Popular options include Speakr, Tachyon Transcripts. These alternatives are free to use and many offer self-hosting options.

What is the best free alternative to Fathom?

The best free alternative to Fathom depends on your specific needs. Speakr is a popular choice with self-hosting capabilities. All alternatives listed here are open source and free to use.

Can I self-host an alternative to Fathom?

Yes, 2 of the alternatives listed here can be self-hosted, giving you complete control over your data and privacy.

Why should I switch from Fathom to an open source alternative?

Open source alternatives to Fathom offer several advantages: no vendor lock-in, complete data ownership, no subscription fees, the ability to self-host for privacy and security, and active community support. You can also customize the software to fit your specific needs.

Fathom

Fathom

AI notetaker that automatically records, transcribes, highlights, and summarizes your Zoom, Google Meet, and Teams meetings.

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