Home / Alternatives / ZeroBounce alternative
ZeroBounce alternative: when ContactLint fits and when it does not
Facts checked October 17, 2026
ZeroBounce and ContactLint answer different questions. ZeroBounce checks whether a mailbox exists. ContactLint checks whether an address is worth saving: is the syntax right, does the domain accept mail, is it a throwaway or role inbox, and is it a typo of a big provider. That smaller check is why it costs less.
The short answer
- Stay with ZeroBounce if you need each mailbox checked before emailing an old or bought list, catch-all validation, email scoring, an email finder or deliverability tools such as warmup and blacklist monitoring in one platform.
- Choose ContactLint if you want a cheap pre-send check at a signup form, in a CRM import or inside an AI agent, and a hosted MCP server you connect to by URL instead of installing.
ZeroBounce publishes an official open-source MCP server that you install locally with npm and run with your API key (it needs Node 18 or newer). ContactLint's MCP server is hosted: you add one URL and a header to your client config. ZeroBounce's smallest pay as you go purchase is $39 for 2,000 addresses; ContactLint's is $9 for 5,000 checks. They are not the same check: ZeroBounce tests the mailbox, ContactLint stops at DNS.
Side by side
| ContactLint | ZeroBounce | |
|---|---|---|
| Confirms the mailbox exists (SMTP) | No. Syntax, DNS/MX, disposable, role and typo checks only; no SMTP connection, no catch-all detection | Yes, sold as email validation with catch-all validation included (source) |
| Smallest purchase | 5,000 checks for $9 | $39 for 2,000 addresses (minimum pay as you go purchase) (source) |
| 5,000 checks | $9 | Not listed |
| 25,000 checks | $35 | Not listed |
| 100,000 checks | $99 | Not listed |
| Free to start | 100 checks every month, no card | 100 free validation credits a month, conditions marked on their page (source) |
| Unknown results | Not charged: any check whose DNS lookup fails is given back | Not charged (source) |
| Credits expire? | No expiry in our terms; unused credits refundable within 14 days | Never while on ZeroBounce ONE; otherwise expiration rules may apply (source) |
| Typo suggestions | Yes, did_you_mean for major providers (gmial.com to gmail.com) | Yes, a did_you_mean field in the API (source) |
| MCP server for AI agents | Hosted remote server at /mcp, nothing to install | Official open-source server you install locally with npm (Node 18 or newer) (source) |
| Phone validation | Yes, same key and same credits | Not listed |
Competitor facts read from each vendor's public pages on October 17, 2026 and linked in each cell. Prices change; follow the links for current terms. "Not listed" means the page we read did not state it, not that the vendor lacks it.
What switching looks like
- Create a free key at /signup.
- Replace one HTTP call:
POST /v1/email/validatewith{"email": "..."}, or/v1/email/validate/batchfor up to 50 addresses. - Map verdicts:
invalidreject,riskyask the user or review (showdid_you_meanwhen set),validaccept,unknownaccept or retry later.
curl -X POST https://contactlint.com/v1/email/validate \
-H "Authorization: Bearer YOUR_KEY" -H "content-type: application/json" \
-d '{"email":"jane@gmial.com"}'
Guides: server-side check on form submit, drop-in typo widget, email validation for AI agents.
Questions
Is ContactLint a full replacement for ZeroBounce?
Only if you do not need mailbox verification. ZeroBounce tests whether the mailbox exists; ContactLint checks syntax, DNS/MX, disposable domains, role addresses and typos, and never connects to mail servers.
Can I use ContactLint and ZeroBounce together?
Yes. A common split is ContactLint at the signup form or inside an AI agent, where volume is steady and a fast cheap check is enough, and a mailbox verifier for occasional deep cleans of an old list.
How do I try ContactLint?
Create a free key at contactlint.com/signup (100 checks per month, no card), or run a live check on the home page without a key.
How we made this page
Written by the ContactLint team. ZeroBounce facts were read from its public pages on October 17, 2026 and are linked in each table cell; we did not test its API. ContactLint facts come from our pricing and API spec. Spot something out of date? Email support@contactlint.com and we will fix it.
Get a free API key. 100 checks per month, no card required. Or try a live check first.