CPA & accounting software with an open API
How open a tool is to integration decides how much it locks you in. Here is every tool in this guide sorted by that — the ones with a self-serve public API first.
Open API — self-serve
You can generate an API key yourself and build against it, no approval needed.
- Karbon — From $59/user/mo
- TaxDome — From $67/user/mo · 10,000+ firms
- QuickBooks Online — From $35/mo
- Xero — From $25/mo
- Bill.com — From $45/user/mo
- ProAdvisor — Free · program · 500k+ members
Gated API
An API exists, but access needs approval, a partner program, or a higher plan.
- CCH Axcess — From $2,299/yr · 12.5% share
- ONESOURCE Calendar — Custom quote
- Canopy — From $45/user/mo
- Financial Cents — From $19/user/mo
- Jetpack Workflow — From $36/user/mo
- Aiwyn — Custom · enterprise
- Sage — From ~$10/mo
Zapier only
No direct API; they connect to the rest of your stack through Zapier.