Theme · updated weekly

Open Source in Finance — SaaS tools & trends 2026

6 products Sparkpulse tracks are shipping around open source in Finance. The highest-velocity open source products right now are Kill Bill, Bigcapital and Firefly III (ranked by Sparkpulse's velocity score). The theme runs across 17 sectors, so the momentum you see here is drawn from products competing in different corners of the market. Their velocity scores span 0.0 to 5.0 out of 10, a spread that shows how unevenly shipping cadence is distributed across the field. Below: every tracked product carrying this theme, updated from release data. Everything on this page is regenerated from verified release data, so the ranking reflects the latest changelogs rather than a static list.

Scoped to Finance. View open source across all sectors →

Products shipping around open source

#01Kill BillKill Bill's 0.25 line ships tags with no notes while 0.24 does the actual work5.0alternatives →

#02BigcapitalOpen-source accounting shipping near-daily fix batches while quietly migrating its front end to TypeScript.5.0alternatives →

#03Firefly IIIFirefly III's feed is a nightly build log — every entry is the same boilerplate with no changelog.5.0alternatives →

#04LNbitsLNbits spends months in release candidates, with the real notes only appearing at the tags in between.2.5alternatives →

#05Maybe FinanceMaybe builds out onboarding and Plaid, then the changelog goes quiet.0.0alternatives →

#06LagoLago is layering AI agents and enterprise gates onto an already-deep usage-based billing engine.0.0alternatives →

Frequently asked questions about open source

Which SaaS tools ship open source in Finance in 2026?

Kill Bill, Bigcapital, Firefly III, LNbits, Maybe Finance, and 1 more — the open source products Sparkpulse tracks in Finance, ranked by shipping velocity from verified changelogs.

Which open source product has the highest shipping velocity?

Kill Bill, with the top velocity score (5.0/10) in Finance — Sparkpulse's velocity score is derived from verified release data.

How many products are shipping around open source?

Sparkpulse currently tracks 6 products carrying the open source theme in Finance, updated continuously from verified release data.