SendBridge
Email verification for cleaning contact lists, checking new addresses through an API, and diagnosing deliverability signals.
About SendBridge
SendBridge is an email verification service for cleaning contact lists before campaigns. Users upload a list in the client area, wait for verification, and download results in XLSX, CSV, or TXT format while preserving the original row order. Each address is classified as Deliverable, Undeliverable, Risky, or Unknown, giving marketing and sales teams a practical basis for deciding which contacts to keep. The service also provides a real-time verification API for Go, Java, PHP, Python, and .NET workflows. Checks cover invalid or undeliverable addresses and risk signals including spam traps, role accounts, catch-all servers, and disposable addresses. A free account includes 100 email checks per month, enough to test the workflow or maintain a small list. Larger volumes require checking the current paid capacity before adoption. SendBridge also offers a separate no-account mail tester with a 0–100 deliverability score plus SPF, DKIM, DMARC, rDNS, content, and blacklist analysis.
Best for
Best use cases
Prepare a CSV contact list for a campaign and remove addresses likely to bounce.
Check new user email addresses as they enter a registration or lead workflow.
Review SPF, DKIM, DMARC, blacklist, and content signals before a send.
Compare before choosing
Choose it when a monthly allowance of 100 checks is enough to test or support a small list.
Compare paid capacity carefully when list volume exceeds the included monthly checks.
Evaluate the API language support and downloadable formats against the existing workflow.
Features
Clean campaign lists
Upload an existing contact list, classify risky or invalid addresses, and download a cleaned file before a campaign.
Verify sign-ups in real time
Connect the verification API to an application so new addresses can be checked as they enter a workflow.
Diagnose email deliverability
Use the no-account mail tester to review authentication, blacklist, content, and inbox-placement signals.
Pros
- The free account includes 100 checks each month, making the list-cleaning workflow easy to test on small volumes.
- Results separate deliverable, undeliverable, risky, and unknown addresses, which supports clear list-cleaning decisions.
- The real-time API and XLSX, CSV, and TXT downloads fit both application and file-based workflows.
Cons
- The 100-check monthly allowance can be too small for teams that regularly process large campaign lists.
- Catch-all and other risky results still require a team policy rather than a simple keep-or-delete decision.
- Adoption may require API integration work when verification must happen inside an existing registration or lead system.
Pricing Plans
Free account
- 100 email address checks per month
- Upload and download list-verification results
* Pricing information is for reference only. Please refer to the latest announcement on SendBridge's official website.