DeBounce
NeverBounce
ZeroBounce
Kickbox
Email List Verify
Bounceless
Hunter.io
BriteVerify
PostalDataPI
Ideal postcodes
Fetchify
Smarty
Data8 UK
ZIP Code API
Data8 UK PredictiveAddress
Email Verification API
DeBounce is a fast, accurate, and affordable email validation service. It helps businesses to get rid of invalid email addresses from their databases. If you use popular ESPs to send emails, DeBounce can easily integrate with them and transfer your lists for validation. Here are some key features of DeBounce:
Besides the paid services, DeBounce offers some free services. It offers a life-time free disposable email detection API that helps you combat fake and temporary signups. However, if you want to have a more complex validation engine, you can go for a paid plan. DeBounce has more than 900 positive reviews which show the customers are satisfied and the team really cares about each customer.
PostalDataPI is a global postal code validation and enrichment API covering 240+ countries and territories. One API, one key, one flat rate — $0.000028 per query with no tiers or subscriptions.
What you get back: Up to 18 metadata fields per postal code — city, state/region, coordinates, timezone, three levels of administrative hierarchy, elevation, and more. Sub-5ms cached responses.
Works everywhere: US ZIP codes, UK postcodes, German PLZ, Japanese postal codes, Canadian FSAs, and 230+ more. Format normalization handles case, spacing, and hyphen variations automatically.
Get started in 60 seconds: 1,000 free queries on signup, no credit card required. SDKs for Python and Node.js. MCP server for AI agents (Claude, Cursor, etc.).
Built for developers: REST API, consistent JSON responses across all countries, OpenAPI spec, llms.txt for AI agent discovery.
DeBounce PostalDataPIWe have recently validated 50K email addresses using DeBounce. All is good so far. I recommend this email validation tool to others.
Based on our record, DeBounce seems to be more popular. It has been mentiond 3 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I was going to recommend debounce.io, but just saw this message. Source: over 4 years ago
Have you run your list through a list cleaner/deliverability solution? I use debounce's API (debounce.io) for our product and it is pretty good. Source: about 5 years ago
I use a list taken from GitHub but we also use an API to check if it’s a disposable inbox (https://debounce.io/). Source: over 5 years ago
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
Ideal postcodes - We help businesses improve UX and data quality with a cutting edge address validation service.
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.
Fetchify - Fetchify delivers fast, accurate address, email, phone and bank validation tools that help businesses capture clean, verified customer data, reduce failed deliveries and improve checkout experiences worldwide.
Kickbox - Verify your email address lists with our drag and drop interface, or integrate into your app with our API. Prevent fake and bot account sign-ups by confirming your users are real humans with a real email address.
Smarty - Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.