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Head-to-head · Usage-Based Billing Software

Flexprice vs Lago

  • Updated Sep 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score Flexprice #2 in Usage-Based Billing Software 8.5/10 Free plan · paid from $299/mo Free plan✓ 4 of 4 features Visit Flexprice
Lago #3 in Usage-Based Billing Software 8.1/10 Free plan Free plan✓ 0 of 4 features Visit Lago

Flexprice leads on 4 checks, Lago on 0, and 1 is even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreFlexprice · 8.5/10
  • Free planboth
  • Most featuresFlexprice · 4 of 4

Flexprice scores higher on our rubric for usage-based billing software: 8.5 against 8.1 out of 10; our editors rank them #2 and #3.

Flexprice offers api metering; Lago doesn't publish it. Flexprice offers event ingestion; Lago doesn't publish it. Flexprice offers prepaid credits; Lago doesn't publish it. Flexprice offers invoice generation; Lago doesn't publish it.

Flexprice is the better fit for growing SaaS with complex usage pricing. Lago is the better fit for teams wanting open-source usage billing.

  • Flexprice fits best

    Growing SaaS with complex usage pricing

  • Lago fits best

    Teams wanting open-source usage billing

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. How we rank.

Side by side

Feature Flexprice 8.5/10 Visit ↗ Lago 8.1/10 Visit ↗
At a glance
Editor score 8.5 8.1
Ranking #2 in Usage-Based Billing Software #3 in Usage-Based Billing Software
Best for Growing SaaS with complex usage pricing Teams wanting open-source usage billing
Pricing model Free plan + paid Free
Starting price $299/mo Not published
Free plan ✓ ✓
Free trial — —
Deployment Cloud Cloud, Self-hosted
Platforms Web Web
Integrations 13 integrations 7 integrations
Features Flexprice 4/4 · Lago 0/4
API metering ✓ (best) Not published
Event ingestion ✓ (best) Not published
Prepaid credits ✓ (best) Not published
Invoice generation ✓ (best) Not published
Specs
Billing model Subscription-plus-usage Not published
Rating methods flat, per-seat, graduated, tiered, volume-based, credit packs, minimum commitments Not published
Our review
Pros
  • Supports API, SDK, Kafka, and cloud event-stream ingestion
  • Handles deduplication, idempotency, credits, rating, and invoicing
  • Growth adds multi-currency billing, dunning, analytics, and unlimited plans
  • AGPLv3-licensed self-hosting with usage metering
  • Supports hybrid pricing, invoices, wallets, portals, and analytics
  • REST API, SDKs, webhooks, tax tools, and seven integrations
Cons
  • Developer limits data retention to 14 days
  • Growth costs $299 per month before Enterprise features
  • Enterprise pricing and contract terms are custom
  • Does not process payments directly
  • Lago Premium pricing requires contacting Lago
  • Automatic dunning is limited to Lago Premium
Our verdict

Flexprice is a usage-based billing and metering platform for AI and SaaS companies. It is designed for engineering and finance teams that need to collect usage events, apply configurable pricing, and generate invoices without maintaining…

Read the review →

Lago is an open-source billing platform for companies using usage-based, subscription, prepaid, or hybrid pricing. It captures product usage, applies pricing rules, generates invoices, connects with payment providers, and provides billing…

Read the review →
  1. FlexpriceUsage-Based Billing Software 8.5Free plan · paid from $299/mo
  2. LagoUsage-Based Billing Software 8.1Free plan

Strengths and trade-offs

  • Flexprice — where it wins

    • Supports API, SDK, Kafka, and cloud event-stream ingestion
    • Handles deduplication, idempotency, credits, rating, and invoicing
    • Growth adds multi-currency billing, dunning, analytics, and unlimited plans

    Where it doesn't

    • Developer limits data retention to 14 days
    • Growth costs $299 per month before Enterprise features
    • Enterprise pricing and contract terms are custom

  • Lago — where it wins

    • AGPLv3-licensed self-hosting with usage metering
    • Supports hybrid pricing, invoices, wallets, portals, and analytics
    • REST API, SDKs, webhooks, tax tools, and seven integrations

    Where it doesn't

    • Does not process payments directly
    • Lago Premium pricing requires contacting Lago
    • Automatic dunning is limited to Lago Premium
  • Flexprice8.5/10 · Free plan · paid from $299/mo

    A broad usage-billing platform for SaaS teams managing complex pricing and invoicing.

    Visit FlexpriceFull verdict →
  • Lago8.1/10 · Free plan

    A broad billing platform for teams building programmable usage and subscription workflows.

    Visit LagoFull verdict →

More comparisons

All Usage-Based billing software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated · How we research and update