Open source Accounting & invoicing

ERPNext

86 · Healthy

Full ERP suite covering accounting, inventory, sales, purchasing and HR, with a CRM module for leads and opportunities.

GPL-3.0★ 40kLast commit yesterday

Bigcapital

58 · Caution

Double-entry accounting with financial reports, inventory and invoicing.

AGPL-3.0★ 3.9kLast commit yesterday

Source-available and unverified licenses

The code for these is public, but the license is not an OSI open source license, or we have not verified it yet. Check the license notes on each project before relying on it.

Akaunting

87 · Healthy

Accounting app for small businesses with invoicing, expenses and an app store.

Free up to a limitBusiness Source License 1.1Relicensed 2023★ 10kLast commit yesterday

Invoice Ninja

74 · Stable

Invoicing, quotes, payments and time tracking for freelancers and small businesses.

Free, no resellingElastic License 2.0★ 10kLast commit 22 days ago

Bigcapital

Double-entry accounting with financial reports, inventory and invoicing.

GitHub bigcapital.app

Alternative to

QuickBooks Xero Zoho Invoice

Will it still be around?

Caution

Score 58/100

Details

Can a business use it freely?

AGPL-3.0 · open source (copyleft)

Details

Flat Rate Deploy

Monthly cost

Bigcapital on OpenTools: $39
QuickBooks: ~~$340~~

You save each month

$301/mo

89% less than today

Saving from month one

You save

Over 3 years: $10,836
In year one: $3,612

List price checked 7 Oct 2026 · Source · Disclaimer

Bespoke

We set up Bigcapital for you. You pay once.

You pay $340 a month for QuickBooks. Setup is $3,000, paid once, and after that Bigcapital runs for about $324 a month (your server, about $24, plus about $300 of maintenance), so at this size it takes more than 12 months to pay back.

Worth it from: bigger planpays back within 12 months
Setup, paid once: $3,000fixed price, agreed up front
Maintenance: $150/houronly when you ask for it

What we do

Data migrationRecords, files and history moved from QuickBooks, with a test run before the cut-over
ConfigurationWorkflows, custom fields, roles, permissions and SSO set up for your team
IntegrationsConnected to your CRM, Slack, accounting tools and APIs
MaintenanceUpdates, fixes and admin help when you ask, at $150 an hour
Paid editionsThe vendor's paid features, enabled, with the licence at cost
ComplianceData residency, audit logs, data processing agreements, security questionnaires
TrainingAn admin walkthrough, a runbook and sessions for your team

Total spent, month by monthQuickBooksBespoke Bigcapital

Show as a table

Month	QuickBooks	Bespoke	Saved so far
Today	$0	$3,000	–
Month 3	$1,020	$3,972	–
Month 6	$2,040	$4,944	–
Month 9	$3,060	$5,916	–
Month 12	$4,080	$6,888	–
Month 18	$6,120	$8,832	–
Month 24	$8,160	$10,776	–
Month 30	$10,200	$12,720	–
Month 36	$12,240	$14,664	–

Servers run on your own cloud account, paid to your provider. Running cost counts about 2 hours of maintenance a month; you're billed only for hours you ask for. Migration and the other activities are quoted with the setup.

Get a fixed quote

Health score: 58/100

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

Score v2 · How it works

Activity

45% weight

100/100

Last commit yesterday (100/100).
1057 commits in the past 12 months (100/100).
47 releases in the past 12 months (100/100).

Bus factor

30% weight

20/100

Top contributor wrote 85% of the last 100 commits (past 12 months).
7 people authored those commits.

Responsiveness

25% weight

28/100

57% of all issues are closed (173 open, 233 closed) (46/100).
5 of 30 recent issues got a reply or were closed (17/100).

License

AGPL-3.0 · Open source (copyleft)

GNU Affero General Public License v3.0 · 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).

Detected by GitHub as AGPL-3.0.

GitHub activity

Stars: 3.9k
Forks: 537
Commits, 12 mo: 1.1k; last yesterday
Releases, 12 mo: 47; last 2 days ago
Contributors: 46; 7 in last 100 commits
Open issues: 173; 233 closed

Snapshot from 2026-10-08 · Funding: patreon

Top contributors

Points for pull requests merged into Bigcapital and reviews of them since 10 October 2025. Building something another user asked for earns more. 24 people have points on Bigcapital in all.

Flat Rate Deploy$39/mo