Postman
7.5#2 in api marketplace softwareFrom $9 a monthFree planWebExtensionLinuxmacOS
VisitPostman vs WhoisJSON API
WhoisJSON API
7.1#17 in api clientsFrom $10 a monthFree planWebAPILinuxmacOS
VisitWhat both publish
| Fact | Postman | WhoisJSON API |
|---|---|---|
| Free plan | Yes | Yes |
| Integrations | Listed integrations include Jira, Slack, 1Password Vault, Amazon API Gateway, AWS Secrets Manager, GitHub, GitLab, Microsoft Teams, and VS Code. | Official clients are listed for PHP, Python 3.7+, and Node.js, and the MCP server is described as compatible with Claude, Cursor, and Windsurf. |
| Support | Premium Support is an Enterprise-only add-on with contractual SLAs, 24/7 global coverage, a priority queue, and premium phone, screen-sharing, and chat channels. | The API documentation says the support team typically responds within a few hours. |
Postman plans
- FreeFree
- Solo$9 a month
- Team$19 a month
- Enterprise—
- EnterprisePriced on request
WhoisJSON API plans
- BasicFree
- Pro$10 a month
- Ultra$30 a month
- Scale$50 a month
- Mega$80 a month
- Giga$120 a month
Pick Postman if…
Postman suits developers and teams that design, test, document, or monitor APIs. Its Free plan includes core API tools, while Enterprise features address advanced collaboration, security, and governance needs.
Pick WhoisJSON API if…
You want what its maker publishes above — check its page for the details.