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Comparison · Finance
Fathom vs Firefly III
A side-by-side editorial comparison of Fathom and Firefly III — release velocity, themes, recent moves, and the top alternatives to consider.
Fathom vs Firefly III: at a glance
| Feature | Fathom | Firefly III |
|---|---|---|
| Sector | Finance | Finance |
| Velocity score | 5.0 | 5.0 |
| Sparks · 30d | 0 | 0 |
| Top themes | financial reporting, accounting, forecasting, integrations | personal finance, self-hosted, open source, nightly builds |
| Last editorial update | 1mo ago | 15h ago |
| Website | — | Visit → |
What is Fathom?
Fathom adds FreeAgent and refines its Pro reports — steady iteration without directional pivots.
Fathom is a financial reporting and forecasting tool for accountants and advisory firms. The most recent product addition in the input is the FreeAgent integration (January 2026), continuing a steady pattern of bringing new accounting platforms into the same workflow. Earlier 2025 work focused on report flexibility — embedded images and PDFs in Pro reports — and forecast operations like forecast snapshots that enable actual-vs-forecast reporting. The recent feed is also heavy with customer stories and educational content rather than fresh product releases.
What is Firefly III?
Firefly III's feed is its automated nightly-build stream, not tagged feature releases
The Firefly III entries in this window are all development and 'develop'-tag nightly builds — pre-release artifacts the maintainer explicitly warns may be buggy. There are no stable, user-facing releases here, just the continuous integration output of an actively developed self-hosted finance manager.
Fathom vs Firefly III: editorial side-by-side
Fathom
5.0FINANCE
Fathom adds FreeAgent and refines its Pro reports — steady iteration without directional pivots.
◆ Current state
Fathom is a financial reporting and forecasting tool for accountants and advisory firms. The most recent product addition in the input is the FreeAgent integration (January 2026), continuing a steady pattern of bringing new accounting platforms into the same workflow. Earlier 2025 work focused on report flexibility — embedded images and PDFs in Pro reports — and forecast operations like forecast snapshots that enable actual-vs-forecast reporting. The recent feed is also heavy with customer stories and educational content rather than fresh product releases.
◆ Where it's heading
Within the visible product entries, Fathom is widening accounting-platform coverage (FreeAgent joins Xero, QBO, Sage and others) and gradually upgrading the Pro report surface — saved views, downloadable insights, embedded files, forecast snapshots. There's no sign of a directional pivot in the input; the cadence reads as a mature product steadily extending its existing surfaces, with marketing weight increasingly on customer stories rather than feature launches.
◆ Prediction
Expect continued accounting-platform additions (the Sage 50 import in beta from late 2024 will likely graduate at some point) and more Pro-tier report-flexibility work. Without a clear directional move in the input, the most likely next year looks like more of the same steady cadence.
Firefly III
5.0FINANCE
Firefly III's feed is its automated nightly-build stream, not tagged feature releases
◆ Current state
The Firefly III entries in this window are all development and 'develop'-tag nightly builds — pre-release artifacts the maintainer explicitly warns may be buggy. There are no stable, user-facing releases here, just the continuous integration output of an actively developed self-hosted finance manager.
◆ Where it's heading
The steady stream of develop builds signals ongoing, day-to-day work on the open-source codebase, but the public feed surfaces the nightly channel rather than milestone releases. Any meaningful feature direction would appear in a tagged stable release, which isn't present in this batch.
◆ Prediction
Expect the nightly develop builds to keep flowing; the next signal worth weighting will be a stable point release that consolidates these changes for non-adventurous users.
Alternatives to Fathom and Firefly III
Other Finance products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either Fathom or Firefly III.
Razorpay
Razorpay's stream is an SEO content blitz on gateway reliability, not product releases.
Quicken
Quicken's feed is comparison-listicle SEO that keeps positioning Business & Personal at the top
Copperleaf
Copperleaf's feed is capital-planning thought leadership, not a product changelog
InvoicePlane
InvoicePlane's beta cycle is mostly security hardening and PHP modernization
Kill Bill
Kill Bill keeps hardening invoice reliability on its mature 0.24 line
See all Fathom alternatives → · See all Firefly III alternatives →
Recent activity from Fathom and Firefly III
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoFirefly IIIDevelopment release for 2026-06-08
- 5d agoFirefly IIIDevelopment release for 2026-06-05
- 7d agoFirefly IIIDevelopment release for 2026-06-02
- 7d agoFirefly IIINightly development build (2026-06-02)
- 8d agoFirefly IIINightly development build (2026-06-01)
- 16d agoFirefly IIINightly development build (2026-05-25)
- 1mo agoFathomCustomer story: Haydenshapes (not a release)
- 1mo agoFathomFreeAgent integration
- 1mo agoFathomCustomer story: MAP (not a release)
- 1mo agoFathomForecast snapshots and actual v forecast reporting
- 2mo agoFathomExpert Series content: BELAY (not a release)
- 2mo agoFathomAdd images and PDFs to Pro reports
Frequently asked questions
What is the difference between Fathom and Firefly III?
They serve adjacent needs but don't currently overlap on shipped themes. Fathom and Firefly III are shipping at a similar cadence (velocity 5.0 vs 5.0, both within Sparkpulse's "active" band). See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Fathom better than Firefly III?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Fathom and Firefly III are shipping at a similar cadence (velocity 5.0 vs 5.0, both within Sparkpulse's "active" band). For your specific use case, the alternatives sections above list other Finance products to evaluate alongside.
What are the best alternatives to Fathom?
Top Fathom alternatives in Finance are ranked by recent ship velocity. Browse the "Fathom alternatives" section above for the current picks, or visit /alternatives/fathomhq for the full list with editorial commentary on each.
What are the best alternatives to Firefly III?
Top Firefly III alternatives in Finance are ranked by recent ship velocity. Browse the "Firefly III alternatives" section above for the current picks, or visit /alternatives/firefly-iii for the full list with editorial commentary on each.