Redash vs Tomba email finder

Redash is an open-source query and dashboard tool that lets teams connect to a data source, write a query, and visualize the results without writing frontend code. Its REST API, documented live at redash.io/help/user-guide/integrations-and-api/api, authenticates each request with a per-user API key sent as `Authorization: Key <api_key>` and lets scripts create queries, trigger refreshes, and pull dashboard results as JSON. Redash Inc.'s hosted SaaS at app.redash.io was discontinued in 2021, so the project now ships only as free, self-hosted open-source software with no vendor-run instance to point the API at.

Tomba's Email Finder API discovers and verifies professional email addresses from a company domain or a person's name, and doubles as a B2B prospecting and lead-enrichment tool via linked domain-search and phone-finder endpoints. It authenticates with a paired `X-Tomba-Key`/`X-Tomba-Secret` header set rather than a single token, and a live Origin-header probe confirms it explicitly supports browser CORS, echoing the request Origin with credentials enabled on both a GET and an OPTIONS preflight.