ZeroBounce
Best for: Teams that want validation bundled with deliverability tools such as inbox tests, blacklist monitoring and warmup, and AI scoring for catch-all addresses.
- Price
- $649 for 100,000, $3,199 for 1,000,000source
- Subscription
- Yes. ZeroBounce ONE from $99/month (10,000 credits minimum), $79/month billed yearly.source
- Credits expire
- Accounts created after June 1, 2026: purchased credits expire two years after the most recent purchase, and do not expire while a ZeroBounce ONE subscription is active. Older accounts: never.source
- Unknown results charged
- No. "We will never charge you for unknown results."source
- Catch-all
- Resolves many catch-alls to valid or invalid during standard validation, plus Verify+ catch-all validation at no added cost. Unresolved ones stay catch-all. Optional AI scoring costs 1 extra credit per address.source
- MCP server
- Yes, official npm package @zerobounce/mcp (github.com/zerobounce/zerobounce-mcp).source