Lago
Billing & PaymentsOpen-source usage-based billing platform for automating metering, pricing, and invoicing for B2B SaaS revenue models.
Lago is an open-source billing API designed for product-led SaaS companies requiring flexible usage-based pricing models. It provides real-time event ingestion, metering, and aggregation with support for complex pricing schemes including tiered, graduated, and hybrid models. The platform excels at handling high-volume event streams and offers both self-hosted and cloud deployment options. Particularly strong for companies transitioning from simple subscriptions to consumption-based revenue models or needing programmatic billing control.
Best for
Engineering-led B2B SaaS companies building usage-based pricing models who need full control over billing logic and data.
Editorial profile generated March 17, 2026 · pricing & endpoint re-verified continuously (see badges above)
26/50
Overall Score
API Quality
9/10
GTM Relevance
17/20
PricingFreemium
Complexitymedium
Learningmedium
Visit lago.dev →API Analysis
REST API
✓
Available
Webhooks
✓
Available
GraphQL
✓
Available
OAuth
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Pricing
freemiumFree Tier
Free self-hosted open-source version, Cloud starts at $49/month, Enterprise with custom pricing for volume and advanced features
Listed pricing, as of Mar 2026 — not independently verified; confirm on the vendor's site before relying on it.
What users say
Themes from 1 real reviews on G2 · ★ 5
Users like
Full control over billing stack with open-source and self-hostable option
Developer-friendly with clean documentation and solid APIs
Supports hybrid pricing models (flat + usage) quickly
Responsive team support on Slack
Users dislike
Slight learning curve when migrating from Stripe Billing or Chargebee
Requires thoughtful integration due to flexibility
Alternatives
Reviews
Links
FAQ
What is Lago?
Lago is an open-source billing API designed for product-led SaaS companies requiring flexible usage-based pricing models. It provides real-time event ingestion, metering, and aggregation with support for complex pricing schemes including tiered, graduated, and hybrid models. The platform excels at handling high-volume event streams and offers both self-hosted and cloud deployment options. Particularly strong for companies transitioning from simple subscriptions to consumption-based revenue models or needing programmatic billing control.
Is Lago free?
Yes, Lago offers a free tier. Free self-hosted open-source version, Cloud starts at $49/month, Enterprise with custom pricing for volume and advanced features Pricing shown is as last reviewed and may change — confirm current pricing on the vendor's site.
What are Lago alternatives?
Popular alternatives to Lago include Stripe, Chargebee, Recurly, Paddle. Compare features, API quality, and pricing on GTM Tools.
Does Lago have an API?
Yes, Lago provides a REST API and GraphQL API. API quality is rated EXCELLENT. Documentation: https://doc.lago.dev.
Who is Lago best for?
Engineering-led B2B SaaS companies building usage-based pricing models who need full control over billing logic and data.
How current is Lago's data on GTM Tools?
Endpoint reachability and pricing for verified-tier tools are re-checked on a schedule — see the verification badges on this page for the latest check. The editorial profile (description, strengths and weaknesses) is last generated March 2026, and any user-review themes are pulled from G2.