OpenTools

Open source Billing & subscriptions

Lago

98 · Healthy

Usage metering and billing engine for subscriptions, usage-based plans, credits and invoicing.

Free, share hosted changesAGPL-3.0★ 11kLast commit 2 days ago

Polar

97 · Healthy

Billing platform for software products, with subscriptions, usage billing, checkout and license keys.

Free to useApache-2.0★ 10kLast commit yesterday

Autumn

90 · Healthy

Pricing and billing layer on top of Stripe that handles plans, usage limits, credits and feature access.

Free to useApache-2.0★ 2.8kLast commit yesterday

OpenMeter

88 · Healthy

Real-time usage metering for AI, API and infrastructure products, feeding usage-based billing.

Free to useApache-2.0★ 2.4kLast commit yesterday

Kill Bill

77 · Stable

Subscription billing and payments platform with product catalogs, invoicing, dunning and payment gateway plugins.

Free to useApache-2.0★ 5.8kLast commit 2 days ago

Flexprice

72 · Stable

Usage-based pricing and billing with real-time metering, credits and top-ups, and feature entitlements.

Free core, paid extrasAGPL-3.0★ 6.9kLast commit 2 days ago

Flexprice

Usage-based pricing and billing with real-time metering, credits and top-ups, and feature entitlements.

Alternative to

Will it still be around?

Stable

Score 72/100

Details

Can a business use it freely?

Free core, paid extras

AGPL-3.0 · open source (copyleft)

Details
Flexprice screenshot 1
Flexprice screenshot 2

Flat Rate Deploy

Orb doesn't publish prices, so this starts at a $40 a month bill, the smallest where switching saves money. Flexprice on OpenTools costs $39 a month, setup included, so you save $1 a month, about $36 over three years. Enter your actual bill to see yours.

Monthly cost

Flexprice on OpenTools
$39
Orb
$40

You save each month

$1/mo

3% less than today

Saving from month one

You save

Over 3 years
$36
In year one
$12

List price checked 9 Oct 2026 · Source · Disclaimer

Health score: 72/100

Stable · activity, bus factor and issue responsiveness, from GitHub

Score v2 · How it works

Activity

45% weight

100/100

  • Last commit 2 days ago (100/100).
  • 7175 commits in the past 12 months (100/100).
  • 50+ releases in the past 12 months (100/100).

Bus factor

30% weight

60/100

  • Top contributor wrote 55% of the last 98 commits (past 12 months).
  • 7 people authored those commits.

Responsiveness

25% weight

36/100

  • 30% of all issues are closed (81 open, 34 closed) (0/100).
  • 15 of 25 recent issues got a reply or were closed (60/100).

License

Free core, paid extras

AGPL-3.0 · Open source (copyleft)

What you need to do

The core is free to use. Enterprise features, kept in a separately licensed part of the code, need a paid license in production.

For Flexprice

The core is AGPL-3.0. Code in internal/ee may only be used in production with a paid Flexprice Enterprise license for your seats.

AGPL-3.0 (core) + Flexprice Enterprise License for internal/ee · Open source (copyleft). OSI-approved license that requires sharing changes under the same license when you distribute (AGPL: also when you offer it over a network).

License text checked 2026-10-09 · Read it

GitHub activity

Stars
6.9k
Forks
975
Commits, 12 mo
7.2k
last 2 days ago
Releases, 12 mo
50+
last yesterday
Contributors
38
7 in last 98 commits
Open issues
81
34 closed

Snapshot from 2026-10-09

Top contributors

Points for pull requests merged into Flexprice and reviews of them since 3 September 2026 (older history is still loading). Building something another user asked for earns more.

  1. 1530 points
  2. 2415 points
  3. 3412 points
  4. 4335 points
  5. 5144 points
  6. 696 points
  7. 756 points
  8. 853 points
  9. 930 points
  10. 1010 points
Bespoke · we set it up$3,000onceFlat Rate Deploy$39/mo