Stigg
Stigg adds credit reservation and settlement for AI operations days after its agent SDK.
Comparison · Finance
Firefly III vs SolidInvoice
A side-by-side editorial comparison of Firefly III and SolidInvoice — release velocity, themes, recent moves, and the top alternatives to consider.
Shared themes:self-hosted
Firefly III vs SolidInvoice: at a glance
What is Firefly III?
Firefly III ships seven develop builds in six days, still with no changelog attached.
Firefly III's feed is all automated develop pre-releases: seven builds between Oct 21 and 26, three of them on Oct 24 alone. None of them carries a changelog. Some are boilerplate warnings, others a single bot line. There has been no stable release in the visible window, so users can't tell from the feed what is changing.
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.
Firefly III vs SolidInvoice: editorial side-by-side
Firefly III
5.0FINANCE
Firefly III ships seven develop builds in six days, still with no changelog attached.
◆ Current state
Firefly III's feed is all automated develop pre-releases: seven builds between Oct 21 and 26, three of them on Oct 24 alone. None of them carries a changelog. Some are boilerplate warnings, others a single bot line. There has been no stable release in the visible window, so users can't tell from the feed what is changing.
◆ Where it's heading
The cadence points to active work toward a next stable release, but the project leaves the record in changelog.md rather than in releases. Until a tagged stable lands, the feed measures commit activity rather than shipped features.
◆ Prediction
What's unclear is when the next stable release lands; the entries give no version target or feature list to anchor a prediction.
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.
Alternatives to Firefly III and SolidInvoice
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 Firefly III or SolidInvoice.
InvoiceShelf
InvoiceShelf 3.0 alphas add bills and suppliers, moving it from invoicing into payables.
Shift4
Shift4 starts its Q4 venue rollout in canary while Customer Hub adds enterprise modifiers.
GOAT.tax
GOAT.tax adds Form 6765 Section G reporting for large R&D credit filers.
Kill Bill
Kill Bill keeps two release lines alive with small invoice-template changes.
Zluri
Zluri is turning SaaS management into identity governance, and Segregation of Duties is the pivot.
See all Firefly III alternatives → · See all SolidInvoice alternatives →
Recent activity from Firefly III and SolidInvoice
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoFirefly IIIFirefly III develop build 2026-10-28.1
- 1d agoFirefly IIIFirefly III develop build 2026-10-28
- 3d agoFirefly IIIFirefly III develop build 2026-10-26
- 4d agoFirefly IIIFirefly III develop build 2026-10-25
- 4d agoFirefly IIIFirefly III develop build 2026-10-24.2
- 4d agoFirefly IIIFirefly III develop build 2026-10-24.1
- 4mo agoSolidInvoiceRelease 3.0.1
- 4mo agoSolidInvoiceRelease 3.0.0 ⚡
- 5mo agoSolidInvoice3.0.0-beta1
- 5mo agoSolidInvoiceRelease 2.3.17
- 7mo agoSolidInvoice3.0.0-alpha2
- 7mo agoSolidInvoiceRelease 2.3.16
Frequently asked questions
What is the difference between Firefly III and SolidInvoice?
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 Firefly III better than SolidInvoice?
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 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.
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.