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Comparison · Finance
SolidInvoice vs Firefly III
A side-by-side editorial comparison of SolidInvoice and Firefly III — release velocity, themes, recent moves, and the top alternatives to consider.
Shared themes:self-hosted
SolidInvoice vs Firefly III: at a glance
What is SolidInvoice?
SolidInvoice finally shipped the 3.0 it spent a year staging in alphas and betas.
After more than twelve months of alpha and beta releases, SolidInvoice 3.0 landed in June with the accumulated work of that cycle: email verification, Google OAuth, two-factor authentication, real user profiles, flat-rate tax support and a Meilisearch-backed search layer. Underneath it, the project moved onto a shared platform config and pulled trial and SaaS logic into an external bundle. The 2.3 line ran in parallel the whole time, absorbing security backports.
What is Firefly III?
A nightly build tag firing several times a day, with the actual changes kept off-feed.
Every recent item is an automated development-release tag from the develop branch, carrying the same boilerplate warning about bugs and possible data loss. Three landed on August 4 alone and four on July 31. The changelog section of each post is empty by the time it reaches this feed, so nothing here indicates what changed.
SolidInvoice vs Firefly III: editorial side-by-side
SolidInvoice
0.0FINANCE
SolidInvoice finally shipped the 3.0 it spent a year staging in alphas and betas.
◆ Current state
After more than twelve months of alpha and beta releases, SolidInvoice 3.0 landed in June with the accumulated work of that cycle: email verification, Google OAuth, two-factor authentication, real user profiles, flat-rate tax support and a Meilisearch-backed search layer. Underneath it, the project moved onto a shared platform config and pulled trial and SaaS logic into an external bundle. The 2.3 line ran in parallel the whole time, absorbing security backports.
◆ Where it's heading
Two threads run through this changelog. The visible one is identity and account management catching up to what users expect from a billing app — signup verification, OAuth, 2FA, self-serve company deletion. The less visible one is the codebase being restructured around reusable solidworx platform components with Sentry and Prometheus instrumentation, which is the shape of a project preparing to run itself as a hosted service rather than only as a download.
◆ Prediction
With 3.0 out and 3.0.1 already repairing the upgrade migration path, the near-term work is likely more 3.0.x stabilization for people coming off 2.3 rather than new features.
Firefly III
5.0FINANCE
A nightly build tag firing several times a day, with the actual changes kept off-feed.
◆ Current state
Every recent item is an automated development-release tag from the develop branch, carrying the same boilerplate warning about bugs and possible data loss. Three landed on August 4 alone and four on July 31. The changelog section of each post is empty by the time it reaches this feed, so nothing here indicates what changed.
◆ Where it's heading
This is continuous-delivery plumbing, not a release narrative. The cadence says the project is under active daily development, which is worth knowing, but the tags carry no feature signal and inflate any velocity measure taken from post count. Real Firefly III direction would have to be read from stable releases, which do not appear in this window.
◆ Prediction
The nightly tags will keep firing at several per day. Meaningful product news will only be visible when a stable release lands, and none of the last ten entries indicate when that is.
Alternatives to SolidInvoice 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 SolidInvoice or Firefly III.
inDinero
A CPA firm publishing pricing pages, not releases — this feed is a sales funnel.
Hyperledger Besu
Besu tags a release candidate a month, and half of them are titled after changelog chores.
Pigment
Pigment's Agents break out of single applications and start reading your spreadsheets.
Carta
Carta is pulling fund back-office paperwork in-app, then walking into the deal team's CRM.
Bigcapital
Bigcapital is rewriting its webapp in TypeScript while closing tenancy and race-condition bugs.
See all SolidInvoice alternatives → · See all Firefly III alternatives →
Recent activity from SolidInvoice and Firefly III
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoFirefly IIIDevelopment release for 2026-08-04
- 1d agoFirefly IIIDevelopment release for 2026-08-04
- 1d agoFirefly IIIDevelopment release for 2026-08-04
- 1d agoFirefly IIIDevelopment release for 2026-08-03
- 2d agoFirefly IIIDevelopment release for 2026-08-03
- 5d agoFirefly IIIDevelopment release for 2026-07-31
- 1mo agoSolidInvoiceRelease 3.0.1
- 1mo agoSolidInvoiceRelease 3.0.0 ⚡
- 2mo agoSolidInvoice3.0.0-beta1
- 2mo agoSolidInvoiceRelease 2.3.17
- 4mo agoSolidInvoice3.0.0-alpha2
- 5mo agoSolidInvoiceRelease 2.3.16
Frequently asked questions
What is the difference between SolidInvoice and Firefly III?
Both compete on the same themes — self-hosted — within Finance. Firefly III is currently shipping more aggressively (velocity 5.0 vs 0.0), with 0 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is SolidInvoice better than Firefly III?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Firefly III is currently shipping more aggressively (velocity 5.0 vs 0.0), with 0 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Finance products to evaluate alongside.
What are the best alternatives to SolidInvoice?
Top SolidInvoice alternatives in Finance are ranked by recent ship velocity. Browse the "SolidInvoice alternatives" section above for the current picks, or visit /alternatives/solidinvoice 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.