Firefly III
Firefly III keeps tagging develop builds daily, still with no release notes.
Comparison · Finance
SolidInvoice vs GOAT.tax
A side-by-side editorial comparison of SolidInvoice and GOAT.tax — release velocity, themes, recent moves, and the top alternatives to consider.
SolidInvoice vs GOAT.tax: at a glance
What is SolidInvoice?
SolidInvoice 3.1.3 patches payment settling and clears 12 Symfony advisories.
SolidInvoice, the self-hosted invoicing app, is in a patch cycle on 3.1. The 29 October trio brought custom invoice templates, invitation expiry and a fixed upgrade path with migrations at startup or as a Helm pre-upgrade job. 3.1.3 follows with fixes: invoices paid through the API or MCP are only marked paid once the payment settles, the revenue chart counts each month once, and a Symfony bump clears 12 security advisories.
What is GOAT.tax?
GOAT.tax calculates the federal R&D credit for whole controlled groups.
GOAT.tax's October 28 release adds Controlled Groups: set up related companies as one group, enter gross receipts, calculate the federal R&D credit at group level and produce group Web and PDF deliverables, with partner portal access. It builds on the Controlled Group data model, multi-company support and October's Form 6765 Section G reporting.
SolidInvoice vs GOAT.tax: editorial side-by-side
SolidInvoice
5.0FINANCE
SolidInvoice 3.1.3 patches payment settling and clears 12 Symfony advisories.
◆ Current state
SolidInvoice, the self-hosted invoicing app, is in a patch cycle on 3.1. The 29 October trio brought custom invoice templates, invitation expiry and a fixed upgrade path with migrations at startup or as a Helm pre-upgrade job. 3.1.3 follows with fixes: invoices paid through the API or MCP are only marked paid once the payment settles, the revenue chart counts each month once, and a Symfony bump clears 12 security advisories.
◆ Where it's heading
After the large 3.0 release in June, work has moved to hardening: upgrade paths, packaging (Snap, static PHP builds) and correctness in payments and reporting. The mention of MCP payments shows AI-agent access is already wired into billing, though the entries don't detail it.
◆ Prediction
Expect more 3.1.x patches on packaging and payment edge cases; the entries don't signal what 3.2 will contain.
GOAT.tax
5.0FINANCE
GOAT.tax calculates the federal R&D credit for whole controlled groups.
◆ Current state
GOAT.tax's October 28 release adds Controlled Groups: set up related companies as one group, enter gross receipts, calculate the federal R&D credit at group level and produce group Web and PDF deliverables, with partner portal access. It builds on the Controlled Group data model, multi-company support and October's Form 6765 Section G reporting.
◆ Where it's heading
The product is moving from single-company studies to group and partner workflows that larger filers and advisory firms need. Recent releases each add one piece of that structure.
◆ Prediction
Expect state credit calculations at controlled-group level next, since the release covers federal credits only.
Alternatives to SolidInvoice and GOAT.tax
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 GOAT.tax.
Shift4
Shift4 Venue Q4-R2 is on canary venues now, with global release set for November 17.
Payhawk
Payhawk adds SWIFT payment tracking and a DualEntry ledger sync as ERP coverage widens
TaxDome
TaxDome Pipelines now remember your filters, and long task names stop getting cut off.
LNbits
LNbits 1.7.1 follows the urgent 1.7.0 fix by rotating auth keys.
Kolleno
Kolleno is stretching from collections software toward the whole cash cycle.
See all SolidInvoice alternatives → · See all GOAT.tax alternatives →
Recent activity from SolidInvoice and GOAT.tax
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 3d agoSolidInvoiceSolidInvoice 3.1.3 fixes payment settling, clears 12 advisories
- 15d agoSolidInvoiceSolidInvoice 3.1.0: custom invoice templates, invitation expiry
- 15d agoSolidInvoiceSolidInvoice 3.1.1: post-3.1.0 bug fixes
- 15d agoSolidInvoiceSolidInvoice 3.1.2 fixes the broken in-app upgrade path
- 16d agoGOAT.taxMajor Feature Release: Controlled Groups
- 29d agoGOAT.taxSection G activity breakdown, EIN and NAICS fields for Form 6765
- 1mo agoGOAT.taxGOAT.tax Release Notes for 09/24/2026
- 2mo agoSolidInvoiceInvoice lines now say '1 hour' instead of '1 hours'
- 2mo agoGOAT.taxGOAT.tax Release Notes for 09/08/2026
- 2mo agoGOAT.taxGOAT.tax Release Notes for 08/30/2026
- 2mo agoGOAT.taxGOAT.tax Release Notes for 08/20/2026
- 4mo agoSolidInvoiceRelease 3.0.1
Frequently asked questions
What is the difference between SolidInvoice and GOAT.tax?
They serve adjacent needs but don't currently overlap on shipped themes. SolidInvoice and GOAT.tax 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 SolidInvoice better than GOAT.tax?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. SolidInvoice and GOAT.tax 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 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 GOAT.tax?
Top GOAT.tax alternatives in Finance are ranked by recent ship velocity. Browse the "GOAT.tax alternatives" section above for the current picks, or visit /alternatives/goat-tax for the full list with editorial commentary on each.