Flexprice vs Lago
Flexprice
flexprice.org
Lago
getlago.comSide by side
| Figure | Flexprice | Lago |
|---|---|---|
| Price from | $299/mo | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | Yes | Yes |
| Web | Yes | Yes |
| Linux | Yes | — |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 4 | 5 |
| Spec score · Usage-Based Billing Software | 9.1 (#1) | 8.5 (#4) |
| Company size | Crunchbase lists Flexprice in the 11–50 employee range. | LinkedIn lists Lago as a privately held IT services company with 11–50 employees. |
| Invoicing | Flexprice handles proration, mid-cycle changes, multi-currency invoices, tax line items, PDF delivery, payment collection, dunning and retries. | Lago generates invoices, manages invoices, supports credit notes, invoice previews and receipts. |
| License | The core repository is AGPLv3, while the company says some enterprise-edition code requires a commercial license under an open-core model. | The Lago platform code is distributed under the AGPLv3 license; separate Agent SDK and MCP repositories use MIT licensing. |
| Pricing models | Its pricing engine supports flat, per-seat, graduated, tiered, volume, credit-pack and minimum-commitment models. | The platform supports consumption pricing, prepaid credits, usage allowances, subscriptions and hybrid plans. |
| Rating on G2 | 4.8 out of 5 from 2 reviews | 0.0 out of 5 from 0 reviews. |
| Rating on Product Hunt | 5.0 out of 5 from 2 reviews | 4.6 out of 5 from 10 reviews. |
| Self-hosting | Flexprice documents running the community edition on customer infrastructure and provides Docker-based setup instructions in its repository. | Lago can run on premises, in a VPC or another customer-controlled environment, alongside its managed cloud option. |
| Usage metering | The platform accepts custom usage events and aggregates them in real time, with deduplication, idempotency keys and exactly-once aggregation claims. | It ingests raw usage events, aggregates them and converts them into billable charges in real time. |
| What it does | Flexprice provides usage metering, pricing logic, feature management, subscription billing and invoice generation for AI and SaaS products. | Lago is an open-source platform for usage-based, subscription, prepaid and hybrid billing that connects product usage and commercial terms to invoices. |
Plans
Flexprice
- DeveloperFree
- DeveloperFree
- Growth$299 a month
- EnterprisePriced on request
Lago
- Open sourceFree
- Open SourceFree
- Open-source self-hostedFree
- Lago PremiumPriced on request
- PremiumPriced on request
In their own words
Flexprice
Flexprice provides usage metering, pricing logic, and invoice generation for AI and SaaS teams. Usage events can arrive through a REST API, SDKs, or direct Kafka integration, with deduplication, idempotency keys, and exactly-once aggregation across time windows. Its pricing engine supports flat, per-seat, graduated, tiered, volume-based, credit-pack, and minimum-commitment models configured in the UI. Invoice generation covers proration, mid-cycle plan changes, multiple currencies, tax line items, PDF delivery, payment collection through Stripe or Braintree, and dunning. Listed integrations include Stripe, Salesforce, HubSpot, Segment, AWS, GCP, Kafka, Snowflake, dbt, Postgres, Slack, and Zapier. The free Developer plan includes up to 100,000 events per month, one pricing plan, and 14-day data retention. Growth costs $299 a month and allows up to 5,000,000 events per month; additional events cost $0.06 per 10K. Flexprice is available via API and web.
Lago
Lago is an open-source billing platform that connects product usage and commercial terms with customer invoices. It supports usage-based, subscription, prepaid, and hybrid pricing, plus quotes, order forms, prepaid credits, entitlements, quotas, subscription and usage charges, and itemized invoices. For AI products, Lago can meter input, output, and cached tokens separately and assign usage to customers for billing. Applications can connect through a REST API, official JavaScript, Python, Ruby, and Go SDKs, or signed webhooks. Listed AI integrations include OpenAI, Anthropic, AWS Bedrock, Google Gemini, and Mistral; payment and finance integrations include Adyen, Stripe, NetSuite, and Xero. The Open source plan is free, licensed under AGPLv3 and self-hosted. Lago Premium is available as cloud or self-hosted deployment, including on-premises or in a VPC, but pricing is provided after contacting Lago. Lago states it is SOC 2 Type II certified and describes single sign-on, role-based access controls, and audit logs. Premium includes platform support, business-hours incident management, and implementation guidance.