# Avalara AvaTax vs Zamp (slim)

> Avalara AvaTax scores 68.8 (B) on agent readiness against Zamp's 49.5 (D), and leads in 6 of 7 scored categories. Zamp leads on reliability. Both do tax calculate. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/avalara-vs-zamp.md (~2,300 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/avalara-vs-zamp.json · canonical https://www.anchorterminal.com/compare/avalara-vs-zamp
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

Avalara AvaTax scores 68.8 (B) on agent readiness against Zamp's 49.5 (D), and leads in 6 of 7 scored categories. Zamp leads on reliability. Both do tax calculate.

- Avalara AvaTax: B 68.8, rank #172 of 722 · https://www.anchorterminal.com/tools/avalara.min.md
- Zamp: D 49.5, rank #609 of 722 · https://www.anchorterminal.com/tools/zamp.min.md
- Avalara AvaTax, good for An agent that must calculate and record US sales tax at address level, with VAT and GST in other countries, and hand the records to filing. Ahead on Schema & documentation, 85 against 44; Agent ergonomics, 84 against 64; Security & auth, 65 against 40; Payments & pricing, 30 against 20; Maintenance & community, 79 against 42; Transparency & trust, 79 against 50.
- Zamp, good for An agent working for a US or Canadian seller that wants Zamp's team to register, file and remit, and needs calculation and transaction sync through a small API. Ahead on Reliability, 72 against 62. Also Free to start without a card.

| Category | Avalara AvaTax | Zamp |
| --- | --- | --- |
| Reliability (16%) | 62 | 72 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 85 | 44 |
| Agent ergonomics (13%) | 84 | 64 |
| Security & auth (14%) | 65 | 40 |
| Payments & pricing (10%) | 30 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 79 | 42 |
| Transparency & trust (7%) | 79 | 50 |

| Fact (where they differ) | Avalara AvaTax | Zamp |
| --- | --- | --- |
| Vendor | Avalara, Inc. | Zamp Inc. |
| Hosted endpoint | `https://rest.avatax.com/api/v2` | `https://api.zamp.com` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | OAuth or key | API key |
| Licence | Proprietary service under the Avalara Service Terms. The SDKs on GitHub are Apache-2.0. The MCP repository holds a README only, with no licence file | Proprietary service under Zamp's Standard Terms and Conditions, which form part of a signed Order Form. The sandbox has its own Developer trial terms |
| Tools exposed | 10 | none |
| MCP registry | `com.avalara/avatax` | not listed |
| Last release | 2026-09-16 | 2026-08-31 |
| Terms last updated | 2023-05-01 | no date given |
| Privacy policy last updated | 2022-08-08 | 2025-02-11 |
| Terms restrict automated access | not found in the text | yes |
| Popularity | 5 stars, 331k npm/wk, 38k PyPI/wk | none |