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What is Bouncer?
Bouncer is an EU-hosted SaaS email verification platform that cleans and validates email lists to protect sender reputation and improve email marketing ROI. Made in Poland, it offers bulk verification, real-time API, and deliverability monitoring.
Bouncer news
Bouncer ranked #9 of 9 in accuracy test by Review Now
EU-hosted platform ranked lower than competitors in independent accuracy test, though praised for non-expiring credits and EU hosting.
Source: Review Now ↗Bouncer gets 93/100 accuracy on work domains in pipe0 benchmark
Tied with MixRank but behind LeadMagic (97) and ZeroBounce (96). Strong on accept-all work domains; weak on one test case (false positive on random hubspot.com mailbox).
Source: pipe0 ↗Capterra reports 319 verified reviews for Bouncer with 4.9/5 rating
High customer satisfaction across 319 reviews; users praise ease of use, accuracy, and API integration; some note UI could be more modern.
Source: Capterra ↗Hack'celeration rates Bouncer 4.1/5 for bulk verification
Verdict: best-in-class for simple bulk verification. Noted friction: requires business email for account creation, no free bulk plan.
Source: Hack'celeration ↗
Key features
Email Verification API
Synchronous and asynchronous REST endpoints with median response of 0.5 seconds per check; batch API supports up to 500,000 addresses per job
Bouncer Shield
Real-time form protection against invalid, compromised, and fraudulent emails
Toxicity Check
Identifies breached, spam trap, and compromised email addresses
Deliverability Kit
Inbox placement tests, SPF/DKIM/DMARC verification, blocklist monitoring, and SpamAssassin evaluation
AutoClean
Automatically verifies new and updated contacts in connected platforms like HubSpot, Klaviyo, Brevo
Data Enrichment
Augments customer data with company information
Email Engagement Insights
Tracks open dates, click activity, reply history, and bounce data
Official MCP Server
Hosted at api.usebouncer.com/mcp with OAuth sign-in, no extra cost, documented for Claude and ChatGPT
Bouncer pricing
Pay-as-you-go credits model with non-expiring credits; no recurring monthly fee for verification. Separate optional subscription for Deliverability Kit. No charges for duplicate emails or unknown results.
| Plan | Price | What's included |
|---|---|---|
| Email Verification Credits (Pay-As-You-Go) | Tiered by volume | 1,000 credits ($8), 5,000 ($35), 10,000 ($60), 50,000 ($250), 100,000 ($400), 250,000 ($750), 500,000 ($1,250), 1,000,000 ($2,000) — credits never expire |
| Deliverability Kit - Starter | $25/month | 250 test emails, 10 IPs/domains, inbox placement tests, blocklist monitoring, SPF/DKIM/DMARC testing |
| Deliverability Kit - Standard | $125/month | 1,000 test emails, 25 IPs/domains, all Starter features |
| Deliverability Kit - Pro | $250/month | 2,500 test emails, 50 IPs/domains, all Starter features |
| Deliverability Kit - Enterprise | Custom pricing | Unlimited test emails, unlimited IPs/domains |
| Bouncer Shield | Volume-based, $2 per 1,000 checks to $1.05 per 1,000 at 1M+ monthly checks | Real-time form verification with automatic volume discounts |
Pros & cons
Pros
- + Non-expiring credits (real advantage over competitors like ZeroBounce)
- + No charges for duplicate emails or unknown results
- + EU-hosted and GDPR compliant
- + High accuracy: 93/100 in third-party test, 4.9/5 rating across 319 verified reviews
- + Fast verification speed (0.5 seconds median per check)
- + Excellent at catch-all domain detection on work email addresses
- + Straightforward, intuitive user interface
- + Responsive, helpful customer support
- + Official MCP server for AI agents at no extra cost
- + Significantly cheaper than ZeroBounce at all volume tiers
- + Verified 4+ billion email addresses total, prevented 500+ million bounces
Cons
- − Cannot reliably verify Microsoft/Outlook/Hotmail addresses (SMTP blocking, returns 'unknown')
- − One test: fake email passed with full confidence when competitors rejected it
- − Account creation requires business email (blocks Gmail, Hotmail, personal domains)
- − Occasional disconnect between API and web dashboard verification results
- − Some users report UI as slightly dated compared to newer competitors
- − Does not find or send emails—verification only
- − No published refund policy or security certificates
- − Reported delayed support response on security issues (2-week delay in one case)
- − No free bulk verification plan (only single-address checker and sampling tool)
Who is Bouncer best for?
- • Teams cleaning email lists in thousands to hundreds of thousands range
- • Companies requiring EU data hosting and GDPR compliance
- • Developers integrating email verification via sync/async REST API
- • Cold emailers protecting campaign deliverability
- • Email marketers and agencies with irregular or bursty verification needs
- • Organizations needing catch-all domain detection for work email lists
- • Sales teams requiring real-time form protection before lead capture
Frequently asked questions
Do Bouncer credits expire?
No, verification credits never expire—unique advantage if you verify in irregular batches.
Does Bouncer have an API and MCP server?
Yes. Real-time and batch REST APIs, plus an official hosted MCP server at api.usebouncer.com/mcp with OAuth sign-in, documented for Claude and ChatGPT, at no extra cost.
Can Bouncer verify Microsoft email addresses?
Not reliably. Microsoft blocks SMTP verification probes, so Outlook, Hotmail, and Live addresses frequently return 'unknown'—documented limitation of email verification, not a Bouncer bug.
What integrations does Bouncer support?
Native integrations with HubSpot, Klaviyo, Brevo, Constant Contact, Mailchimp, Pabbly Connect, and others. API-based integrations for email marketing, CRM, outreach, and automation platforms.
How is Bouncer priced vs. ZeroBounce?
Bouncer is significantly cheaper: ~$8 per 1,000 credits vs. ZeroBounce's ~$15 per 1,000. ZeroBounce includes extra deliverability tools; Bouncer separates verification and monitoring pricing.
