FreeAgent
by FreeAgentFreeAgent is aimed at small businesses, accountants and bookkeepers handling accounts, invoicing, expenses or tax administration.
Free plan Free trial AndroidiPhone & iPadWebAPI
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Best Accounting APIs 2026
Facts read 20 Sep 2026 – 21 Oct 2026
Accounting APIs help software connect with accounting services and move records such as invoices and journal entries. They suit developers and teams choosing an integration for web or app software.
The standings: top 10
| Name | In a line | Record score | Price from | Try it free | Runs on | Facts read |
|---|---|---|---|---|---|---|
| 01 FreeAgent | FreeAgent is aimed at small businesses, accountants and bookkeepers handling accounts, invoicing, expenses or tax administration. | 6.0 | Free plan | Free plan | Android, iPhone & iPad, Web, API | 19 Oct 2026 |
| 02 Knit | 6.0 | $29 a month | Free plan | Android, iPhone & iPad, Web, API | 30 Sep 2026 | |
| 03 FreshBooks | It suits freelancers, solopreneurs and small businesses that need invoicing, expense tracking and time-based billing. | 5.8 | $4.60 a month | Free trial | Android, iPhone & iPad, Web, Windows | 15 Oct 2026 |
| 04 Moneybird API | 5.8 | €3 a month, billed yearly | Free plan | Android, iPhone & iPad, Web, API | 4 Oct 2026 | |
| 05 MYOB Business | MYOB Business suits businesses looking for accounting tools alongside invoicing, inventory, and staff operations features. | 5.6 | A$15 a month | Free trial | Android, iPhone & iPad, Web, Windows | 21 Oct 2026 |
| 06 Billy API | 5.5 | 160 DKK a month | Free plan | Web, API | 5 Oct 2026 | |
| 07 KashFlow | Starter is positioned for sole traders, contractors and small businesses. | 5.5 | £97 a year | Free trial | Android, iPhone & iPad, Web, API | 21 Oct 2026 |
| 08 Zoho Books | Zoho Books suits people or businesses managing accounting tasks such as invoicing, expenses, banking, and inventory. | 5.5 | $15 a month | Free plan | Android, iPhone & iPad | 27 Sep 2026 |
| 09 Holded API | It suits businesses that need to connect Holded business records and workflows to software. | 5.4 | $15 a month | Free trial | Android, iPhone & iPad, Web, API | 28 Sep 2026 |
| 10 e-Boekhouden API | 5.3 | €4.98 a month | Free plan | Android, iPhone & iPad, Web, API | 9 Oct 2026 |
This list is ordered by newest releases, with the figures makers publish. Compare plan access, platform support, sync direction, webhooks, sandbox access and API authentication.
02
Knit
AndroidiPhone & iPadWeb+1 Record6.0 Visit
03
FreshBooks
It suits freelancers, solopreneurs and small businesses that need invoicing, expense tracking and time-based billing.
AndroidiPhone & iPadWeb+4 Record5.8 Visit
04
Moneybird API
AndroidiPhone & iPadWeb+1 Record5.8 Visit
05
MYOB Business
MYOB Business suits businesses looking for accounting tools alongside invoicing, inventory, and staff operations features.
AndroidiPhone & iPadWeb+2 Record5.6 Visit
7
KashFlow
AndroidiPhone & iPadWeb+1 £97 a year Record5.5 Visit Starter is positioned for sole traders, contractors and small businesses.
8
Zoho Books
AndroidiPhone & iPad $15 a month Record5.5 Visit Zoho Books suits people or businesses managing accounting tasks such as invoicing, expenses, banking, and inventory.
9
Holded API
AndroidiPhone & iPadWeb+1 $15 a month Record5.4 Visit It suits businesses that need to connect Holded business records and workflows to software.
15
Akaunting
Web $72 a year Record4.6 Visit Akaunting suits businesses seeking web accounting with invoicing, receipts, inventory, bank feeds, and accountant access.
18
Exact Online
Web — Record4.4 Visit Exact Online suits businesses seeking cloud accounting and CRM, or industry-specific tools for manufacturing, wholesale or professional services.
Before you choose
Compare plan access and trials
A free plan is available from tools on this list. A free trial is also available from tools on this list, but trial length and paid pricing differ.
Check the published starting price or request a quote before you connect a production workflow.
Match the platform to your stack
Platforms represented here include web, API, Android, iOS, Windows and macOS. Confirm that the tool supports the environment where your software runs.
Check the records and sync direction
Compare invoice sync, journal entries and sync direction. These fields show whether the connection fits the records your workflow needs to read or change.
Review webhooks, sandbox and authentication
Webhooks can affect how your software receives updates. Check for a sandbox environment and review the API authentication method before planning an integration.
Questions
Do accounting APIs offer free plans?
Yes. The list includes tools with a free plan, including Billy API, Conductor QuickBooks Desktop API and e-Boekhouden API.
Can I try an accounting API before paying?
Yes. Free trials are listed for tools such as Apideck, Billy API and e-Boekhouden API. Trial terms vary by tool.
Which platforms do these accounting tools support?
Platforms represented on the list are web, API, Android, iOS, Windows and macOS.
What accounting features can I compare?
The comparison covers invoice sync, journal entries, sync direction, webhooks, sandbox environment and API authentication.
How is pricing shown?
Pricing may show a free plan, a paid starting price or pricing on request. Examples include $49/mo for Conductor QuickBooks Desktop API and $599/mo for Apideck.
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