| Price from | Free | $75/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Plans published | 13 | 6 |
| Spec score · Tax Compliance Software | 8.1 (#24) | 9.2 (#2) |
| API | GSTZen provides APIs for e-invoice generation, E-Way Bill workflows, and GSTIN validation; its e-invoice API page says responses are delivered in under 200 ms. | The REST API reference lists 55 customer endpoints and is generated from the production OpenAPI specification. |
| API access | Yes | Yes |
| Filing support level | automated | automated |
| Headquarters | 4th Floor, Trident Towers, 23, 100 Feet, Ashoka Pillar Rd, 2nd Block, Jayanagar, Bengaluru, Karnataka 560011 | San Francisco, California, United States |
| Integrations | The maker lists e-invoice integrations with Tally, SAP, Oracle, Microsoft Dynamics, Excel, and APIs. | Direct connectors include Amazon, BigCommerce, Chargebee, Deel, Magento, NetSuite, Orb, QuickBooks, Sage Intacct, Shopify, Shopware, Stripe, Walmart, WooCommerce and Xero. |
| Return filing | The product supports GST return preparation and filing with data validation checks and annual return auto-population from monthly returns. | Yes |
| Sales tax calculation | Yes | Yes |
| Supported tax types | GST,including CGST,IGST and UTGST | sales tax |
