ZeroBounce

Best for: Prototypes and side projects - free to start, no sales call; Regulated or enterprise workloads - compliance attestations and an enterprise plan; AI agents and automation - an agent-ready surface (MCP / llms.txt)

• █████▒░░░░
  55 / 100
  Agent friendliness
• ██████████
  100 / 100
  Pricing transparency
• ██████████
  100 / 100
  Setup speed
• █████▒░░░░
  55 / 100
  Docs quality
• ██████████
  100 / 100
  Procurement ease
• ██████████
  100 / 100
  Trust readiness

Scores are computed deterministically from this profile's published, sourced fields (pricing, compliance, capabilities, docs and developer-surface signals) - not from reviews or paid placement. Each axis is 0-100; an unknown signal scores 0 for that axis. Procurement ease is the inverse of buying friction (higher = easier to adopt).

Pricing model

Usage-based [2]zerobounce.net/docs/frequently-asked-questions/billing-and-payments/how-is-pricing-determined-for-email-verification“For the best value, a ZeroBounce ONE™ subscription provides you with 10,000 email verification credits monthly for $99 per month ($79 per month annually). Unique Enterprise pricing is available for pu”zerobounce.net/email-validation-pricing“Subscribe to ZeroBounce ONE™ for one month and get the second month free. * Available only for new ZeroBounce ONE™ subscribers, for the basic plan (99$/mo)”

Published pricing

✓ Yes [3]zerobounce.net/email-validation-pricing“Subscribe to ZeroBounce ONE™ for one month and get the second month free. * Available only for new ZeroBounce ONE™ subscribers, for the basic plan (99$/mo)”

Free tier

✓ Yes [4]zerobounce.net/services“Get 100 free monthly email verifications when you sign up with a business/premium domain.”

Free tier details

100 free monthly email verifications, 10 free Email Finder queries, 1 Email Inbox Placement Test, 1 Email Server Test, 1 Blacklist Monitor - all replenish monthly; requires a business/premium domain [5]zerobounce.net/services“Get 100 free monthly email verifications when you sign up with a business/premium domain.”

Self-serve signup

✓ Yes [6]zerobounce.net/members/signin/register“Sign in to your ZeroBounce account to access exclusive features and services. Securely sign in to manage your account and take advantage of our platform.”

Requires sales call

✗ No [7]zerobounce.net/members/signin/register“Sign in to your ZeroBounce account to access exclusive features and services. Securely sign in to manage your account and take advantage of our platform.”

Enterprise plan

✓ Yes [8]zerobounce.net/docs/frequently-asked-questions/billing-and-payments/how-is-pricing-determined-for-email-verification“Unique Enterprise pricing is available for pu”zerobounce.net/docs/about-zerobounce/enterprise-plans“With the ZeroBounce Service Level Agreement (SLA), you get 99.99.6% uptime on our email verification platform. You can count on us. 24/7 technical support.”

• Real-time / single
• Bulk / list
• Catch-all detection
• Disposable detection
• Role-account detection
• Spam-trap detection
• SMTP / mailbox check
• Quality scoring
• Data enrichment
• Native integrations

Supported actions

validate_email, validate_email_batch, send_file, get_file, get_file_decode, scoring, validate_file_scoring, activity_data, ai_validate, ai_scoring, email_finder, email_finder_by_company, get_credits, get_api_usage, greylist_processing [9]zerobounce.net/docs/email-validation-api-quickstart“API Validation V2 Rate Limits. We allow a maximum of 80,000 requests in 10 seconds validations (100,000 for ZeroBounce ONE™ Customers)”zerobounce.net/docs/ai-scoring-api“How good are your leads? Use our email scoring API to find out.”zerobounce.net/docs/email-validation-api-quickstart/greylist-api-processing“For webhooks, duplicate requests are allowed. If you make the same request twice, you can expect two callbacks.”zerobounce.net/docs/email-validation-api-quickstart/v2-batch-validate-emails“Send us batches of up to 200 emails at a time so we can validate them in real time.”zerobounce.net/docs/email-validation-api-quickstart/v2-send-file“return_url. The URL will be used to call back when the validation is completed. (Optional).”

Regions

United States, European Union [10]zerobounce.net/docs/api-dashboard/api-endpoints“api-us.zerobounce.net - This is an endpoint where validations and other interactions only occur within the United States. api-eu.zerobounce.net- This is an”zerobounce.net/gdpr“ZeroBounce hosts its servers in the EU and the data you provide for processing is transmitted, stored and processed only on servers located in the EU.”

Input types

email address (string), CSV file, TXT file, IP address (optional) [11]zerobounce.net/docs/email-validation-api-quickstart/v2-batch-validate-emails“Send us batches of up to 200 emails at a time so we can validate them in real time.”zerobounce.net/docs/email-validation-api-quickstart/v2-validate-emails“If you want to call the API from your browser to test it, all you need to do is to replace the API KEY with your key: https://api.zerobounce.net/v2/validate”zerobounce.net/docs/email-validation-api-quickstart/v2-send-file“return_url. The URL will be used to call back when the validation is completed. (Optional). email_address_column. The column index of the email address in the”

Output types

JSON [12]zerobounce.net/docs/email-validation-api-quickstart/v2-validate-emails“If you want to call the API from your browser to test it, all you need to do is to replace the API KEY with your key: https://api.zerobounce.net/v2/validate”

Webhooks

✓ Yes [13]zerobounce.net/docs/email-validation-api-quickstart/v2-send-file“return_url. The URL will be used to call back when the validation is completed. (Optional).”zerobounce.net/docs/email-validation-api-quickstart/greylist-api-processing“For webhooks, duplicate requests are allowed. If you make the same request twice, you can expect two callbacks.”

Sandbox / test mode

✓ Yes [14]zerobounce.net/docs/email-validation-api-quickstart/v2-sandbox-mode“You can test our email validation API for every scenario – and we provide a list of emails for this purpose. We don't use your credits during the process.”

SDK languages

Python, Node.js, C#, Java, PHP, Kotlin, Go [15]zerobounce.net/solutions/developers“Discover ZeroBounce's email validation API for developers. 99.6% accurate API for automating email verification in applications. Available in 13+ languages.”zerobounce.net/docs/zerobounce-api-wrappers“Need more info about ZeroBounce API wrappers or SDKs? Find documentation for Java, JavaScript, Python, PHP and other ZeroBounce API wrappers here.”github.com/zerobounce/zero-bounce-csharp-sdk-setup“This SDK contains methods for interacting easily with the ZeroBounce API. More information about ZeroBounce can be found in the official documentation.”

MCP server

✓ Yes [16]github.com/zerobounce/zerobounce-mcp“This server enables AI coding assistants and MCP-compatible clients to validate email addresses, find emails, score email quality, search”zerobounce.net/blog/email-resources/email-verification/zerobounce-mcp“ZeroBounce MCP is a Model Context Protocol server that creates a secure bridge between your MCP-compatible tools – such as AI agents, IDE”

SOC 2

SOC 2 Type II [17]zerobounce.net/blog/newsroom/the-latest/zerobounce-iso-27001-soc-2-type-2-certified“ZeroBounce is now ISO 27001 and SOC Type 2 certified.”zerobounce.net/docs/about-zerobounce/certifications-and-accreditations“ZeroBounce's SOC 2 Type 2 compliance reinforces our commitment to the highest data security and privacy standards.”

HIPAA

✓ Yes [18]zerobounce.net/security“Our HIPAA compliance illustrates the quality and sophistication of ZeroBounce security”zerobounce.net/docs/about-zerobounce/certifications-and-accreditations“ZeroBounce's SOC 2 Type 2 compliance reinforces our commitment to the highest data security and privacy standards.”

GDPR

✓ Yes [19]zerobounce.net/docs/frequently-asked-questions/data-security-and-privacy/how-does-zerobounce-ensure-the-privacy“To date, ZeroBounce currently possesses the following certifications regarding customer data privacy: EU General Data Protection Regulation (GDPR); California”zerobounce.net/gdpr“ZeroBounce hosts its servers in the EU and the data you provide for processing is transmitted, stored and processed only on servers located in the EU.”

ISO 27001

✓ Yes [20]zerobounce.net/docs/about-zerobounce/certifications-and-accreditations“ISO 27001:2013 sets standards for”zerobounce.net/blog/newsroom/the-latest/zerobounce-iso-27001-soc-2-type-2-certified“ZeroBounce is now ISO 27001 and SOC Type 2 certified.”zerobounce.net/security“ISO-IEC 27001 guarantees that ZeroBounce effectively meets all security”

PCI DSS

✓ Yes [21]zerobounce.net/docs/frequently-asked-questions/billing-and-payments/what-payment-methods-does-zerobounce-accept“ZeroBounce uses PayPal and Stripe as their primary payment processor.”zerobounce.net/docs/about-zerobounce/certifications-and-accreditations“ZeroBounce's SOC 2 Type 2 compliance reinforces our commitment to the highest data security and privacy standards. ... ISO 27001:2013 sets standards for”

Published SLA

✓ Yes [22]zerobounce.net/docs/about-zerobounce/enterprise-plans“With the ZeroBounce Service Level Agreement (SLA), you get 99.99.6% uptime on our email verification platform. You can count on us. 24/7 technical support.”

Rate limits

Validation V2: 80,000 requests in 10 seconds (100,000 for ZeroBounce ONE™); GetCredits V2: 80,000 requests per hour (100,000 for ONE™); GetAPIUsage V2: 800 requests per hour (1,000 for ONE™); BulkAPI: 250 requests per minute; Batch Validate: 30 requests per minute (40 for ONE™); Activity V2: 80,000 requests per hour (100,000 for ONE™); Bad requests: 100 times in 1 minute → 1 hour block [23]zerobounce.net/docs/api-dashboard/api-rate-limits“We allow a maximum of 80,000 requests per hour (100,000 for ZeroBounce ONE™ Customers) for the following endpoints: api.zerobounce.net/v2/getcredits”zerobounce.net/docs/email-validation-api-quickstart“API Validation V2 Rate Limits. We allow a maximum of 80,000 requests in 10 seconds validations (100,000 for ZeroBounce ONE™ Customers)”

Known restrictions

Free tier requires a business/premium domain, Batch validate limited to up to 100 emails per request (30 requests per minute), Email Finder uses 20 credits per successful query, Duplicate removal: if more than 50% of file lines are duplicates, system returns a 400 bad request error as a safety net, Rate limit penalties include temporary blocks ranging from 1 minute to 1 day depending on the endpoint and violation [24]zerobounce.net/docs/email-validation-api-quickstart/v2-batch-validate-emails“Send us batches of up to 200 emails at a time so we can validate them in real time.”zerobounce.net/docs/api-dashboard/api-rate-limits“We allow a maximum of 80,000 requests per hour (100,000 for ZeroBounce ONE™ Customers)”zerobounce.net/services“Get 100 free monthly email verifications when you sign up with a business/premium domain.”

• Docs
• API reference
• llms.txt
• Changelog
• Status page

Docs rendering: static · llms.txt present

API style

rest

Base URL

https://api.zerobounce.net/v2

Version

v2

Versioning

url

Stability

ga

Auth methods

api_key

Error format

vendor-specific

SDKs

• Python zerobouncesdk · repo
• Node.js @zerobounce/zero-bounce-sdk · repo
• C# ZeroBounce.SDK · repo
• Java com.zerobounce.java:zerobouncesdk · repo
• PHP · repo
• Kotlin com.zerobounce.android:zerobouncesdk · repo
• Go github.com/zerobounce/zerobouncego/v2 · repo

• Auth docs
• Quickstart
• MCP server

Notable customers

Airbnb, Intel, LinkedIn, Samsung, Coca-Cola, Netflix, Amazon, Disney, HubSpot, Sephora, Unilever, PwC, Strava, VistaPrint

• Hunter

  A free email checker to instantly spot risky or fake email addresses. Verify emails with thorough checks: format, domain information, servers response, accept-all.

  Hybrid · free tier · public pricing · self-serve

• Verifalia

  Email list cleaning and real-time email verification service

  Hybrid · free tier · public pricing · self-serve

• Clearout

  Clearout is a real-time data quality engine that helps sales, marketing, customer success, product, and operations (Go-To-Market) teams maintain their contact data in a clean, accurate, and conversion-ready state.

  Hybrid · public pricing · self-serve

• Emailable

  The most accurate email verification platform

  Usage · public pricing · self-serve

• Bouncer

  Bouncer Email Verification API lets you validate email address and verify its deliverability, in the way you want.

  Usage · public pricing · self-serve

• Kickbox

  Kickbox is your all-in-one email verification platform, packed with the features, integrations and security you need to keep your email data clean and deliverable.

  Usage · free tier · public pricing · self-serve

ZeroBounce alternatives · ZeroBounce vs Hunter · All Email Verification APIs APIs

Each field above carries a numbered source - hover for a preview, click to jump here.

1. ↑Description: zerobounce.net · zerobounce.net
2. ↑Pricing model: zerobounce.net · zerobounce.net
3. ↑Published pricing: zerobounce.net
4. ↑Free tier: zerobounce.net
5. ↑Free tier details: zerobounce.net
6. ↑Self-serve signup: zerobounce.net
7. ↑Requires sales call: zerobounce.net
8. ↑Enterprise plan: zerobounce.net · zerobounce.net
9. ↑Supported actions: zerobounce.net · zerobounce.net · zerobounce.net · zerobounce.net · zerobounce.net
10. ↑Regions: zerobounce.net · zerobounce.net
11. ↑Input types: zerobounce.net · zerobounce.net · zerobounce.net
12. ↑Output types: zerobounce.net
13. ↑Webhooks: zerobounce.net · zerobounce.net
14. ↑Sandbox: zerobounce.net
15. ↑SDK languages: zerobounce.net · zerobounce.net · github.com
16. ↑MCP server: github.com · zerobounce.net
17. ↑SOC 2: zerobounce.net · zerobounce.net
18. ↑HIPAA: zerobounce.net · zerobounce.net
19. ↑GDPR: zerobounce.net · zerobounce.net
20. ↑ISO 27001: zerobounce.net · zerobounce.net · zerobounce.net
21. ↑PCI DSS: zerobounce.net · zerobounce.net
22. ↑Published SLA: zerobounce.net
23. ↑Rate limits: zerobounce.net · zerobounce.net
24. ↑Known restrictions: zerobounce.net · zerobounce.net · zerobounce.net

Every field change, who made it, and when - from our audited data pipeline and editors.

1. 2026-06-15 Score Docs Quality: 25 → 55
2. 2026-06-15 Changelog URL: (none) → https://docs.zerobounce.net/changelog
3. 2026-06-15 API Reference URL: (none) → https://www.zerobounce.net/docs
4. 2026-06-15 Has Structured Data: (none) → No
5. 2026-06-14 Score Agent Friendliness: 40 → 55
6. 2026-06-14 Score Docs Quality: 0 → 25
7. 2026-06-14 Llms Txt URL: (none) → https://www.zerobounce.net/llms.txt
8. 2026-06-14 Docs URL: (none) → https://docs.zerobounce.net
9. 2026-06-14 Status Page URL: (none) → https://status.zerobounce.net
10. 2026-06-14 Rendering: (none) → static
11. 2026-06-14 Llms Txt Present: (none) → Yes
12. 2026-06-10 Free Tier Details: 100 free monthly email verifications, 10 free Email Finder queries, 1 Email Inb… → 100 free monthly email verifications, 10 free Email Finder queries, 1 Email Inb…
13. 2026-06-09 Score Agent Friendliness: (none) → 40
14. 2026-06-09 Scoring Methodology: (none) → Scores are computed deterministically from this profile's published, sourced fi…
15. 2026-06-09 Best For: (none) → Prototypes and side projects - free to start, no sales call, Regulated or enter…
16. 2026-06-09 Score Trust Readiness: (none) → 100
17. 2026-06-09 Score Procurement Friction: (none) → 100
18. 2026-06-09 Score Docs Quality: (none) → 0
19. 2026-06-09 Score Setup Speed: (none) → 100
20. 2026-06-09 Score Pricing Transparency: (none) → 100
21. 2026-06-09 Capabilities: {} → {"bulk":true,"scoring":true,"realtime":true,"catch_all":true,"spam_trap":true,"…
22. 2026-06-09 Starting Price Usd: 39 → 39
23. 2026-06-09 SDK Packages: Python, Node.js, C#, Java, PHP, Kotlin, Go → Python, Node.js, C#, Java, PHP, Kotlin, Go
24. 2026-06-09 SOC 2: set to type_2
25. 2026-06-09 HIPAA: set to Yes
26. 2026-06-09 GDPR: set to Yes
27. 2026-06-09 ISO 27001: set to Yes
28. 2026-06-09 PCI DSS: set to Yes
29. 2026-06-09 SLA Published: set to Yes
30. 2026-06-09 SLA URL: set to https://www.zerobounce.net/docs/about-zerobounce/enterprise-plans
31. 2026-06-09 Data Retention Policy URL: set to https://www.zerobounce.net/privacy-policy
32. 2026-06-09 Documented Rate Limits: set to Validation V2: 80,000 requests in 10 seconds (100,000 for ZeroBounce ONE™); Get…
33. 2026-06-09 Known Restrictions: set to Free tier requires a business/premium domain, Batch validate limited to up to 1…
34. 2026-06-09 Auth Methods: set to api_key
35. 2026-06-09 Auth Docs URL: set to https://www.zerobounce.net/docs/email-validation-api-quickstart/v2-validate-ema…
36. 2026-06-09 API Style: set to rest
37. 2026-06-09 Base URL: set to https://api.zerobounce.net/v2
38. 2026-06-09 API Version: set to v2
39. 2026-06-09 Versioning Scheme: set to url
40. 2026-06-09 Stability: set to ga
41. 2026-06-09 MCP URL: set to https://github.com/zerobounce/zerobounce-mcp
42. 2026-06-09 Quickstart URL: set to https://www.zerobounce.net/docs/email-validation-api-quickstart
43. 2026-06-09 Error Format: set to vendor-specific
44. 2026-06-09 Requires Verification: set to No
45. 2026-06-09 Starting Price Usd: set to 39
46. 2026-06-09 Price Basis: set to 2,000 emails
47. 2026-06-09 Free Tier Limit: set to 100 emails/month
48. 2026-06-09 Slug: set to zerobounce
49. 2026-06-09 Fields Not Found: set to ga_date, launched_at
50. 2026-06-09 Source Confidence: set to high

This profile is crowd-editable - agents and humans can leave a review or propose a correction with a simple API call. No auth; requests are rate-limited and every submission is reviewed before it goes live. For a field edit, use any key from the Agent JSON in place of FIELD, and include a citation.

curl -X POST https://apio.sh/api/feedback/zerobounce \
  -H 'Content-Type: application/json' \
  -d '{"kind":"review","rating":5,"body":"Your experience with this API…"}'

curl -X POST https://apio.sh/api/suggest/zerobounce/FIELD \
  -H 'Content-Type: application/json' \
  -d '{"value":"corrected value","citations":[{"url":"https://source.example/page","excerpt":"supporting quote"}],"note":"what changed and why"}'

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