head to head · open source
Lago vs SolidInvoice
Lago has 10,748 GitHub stars, 782 forks, 23 open issues and last shipped yesterday. SolidInvoice has 980 stars, 248 forks, 190 open issues and last shipped yesterday. Lago leads on adoption by 997% (10,748 vs 980 stars). Lago is written in Go under AGPL-3.0; SolidInvoice is written in PHP under MIT. Lago has attracted 7% as many forks as stars, SolidInvoice 25%. SolidInvoice was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (billing, invoices), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Lago | SolidInvoice | |
|---|---|---|
| GitHub stars | ★ 11K | ★ 980 |
| License | AGPL-3.0 | MIT |
| Written in | Go | PHP |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 782 | ⑂ 248 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Lago if
- You weight community size — 11K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick SolidInvoice if
- You want the SolidInvoice feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches PHP
- You evaluated both and SolidInvoice fits your workflow better
About Lago
Lago Agentic first, open source monetization infrastructure for AI products Meter tokens, compute, API calls, or any product usage. Turn usage into pricing, credits, entitlements, invoices, payments, and revenue. Use Lago Direct for your own product, or Lago Embedded to power monetization for your customers. Run the AI billing demo · Documentation · Talk to us about Lago Cloud “Lago has been able to follow the pace of our releases and has allowed us to focus on what we do best.” Timothée Lacroix, CTO at Mistral AI · Read the customer story See Lago price an AI workload Run the maintained demo from this…
About SolidInvoice
SolidInvoice The open source invoicing platform for freelancers and small businesses. Send beautiful quotes and invoices, accept online payments, automate recurring billing — and own every byte of your data. Why SolidInvoice? Most invoicing tools force a trade off: easy to use or respectful of your data. SolidInvoice gives you both. It's a mature, production ready billing platform you can run on your own server for free, or let us host for a flat $8/month — no per client limits, no surprise tiers, no lock in. Built on Symfony 7 and PHP 8.4, it's designed to be extended, integrated, and trusted. ✨ Features 💼…
read the full SolidInvoice overview →
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Frequently asked questions
Is Lago or SolidInvoice more popular?
Lago has 10,748 GitHub stars and SolidInvoice has 980. Lago has the larger community by that measure.
Are Lago and SolidInvoice free?
Both are open source. Lago is licensed under AGPL-3.0 and SolidInvoice under MIT. Neither carries a licence fee.
What is the difference between Lago and SolidInvoice?
Lago is written in Go and SolidInvoice in PHP. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Lago or SolidInvoice?
Choose Lago if you want the larger community (10,748 stars) or its AGPL-3.0 licence terms. Choose SolidInvoice if its feature set, stack or MIT licence fits better. Both are self-hostable.