AtData SafeToSend
AtData SafeToSend is a paid email-validation service available through the web and an API.
What AtData SafeToSend is
AtData SafeToSend is a paid email-validation service available through the web and an API. It uses real-time activity and engagement signals to assess whether addresses are valid and valuable for marketing. The service identifies spam traps, toxic deliverable addresses, inactive contacts, and disposable addresses, while correcting misspelled or invalid domains and extra or missing characters. Users can upload lists from a device, FTP, an email marketing platform, or the API. Its real-time API checks addresses as they are entered on forms or collected in stores. InstantData supplies quality summaries and analysis using more than 35 response codes. AtData says the system analyzes approximately 100 billion monthly email activity signals; clients report average unknown-rate reductions of 6%, with some up to 29%. Integrations include Mailchimp, HubSpot, Klaviyo, and Salesforce Marketing Cloud. Files are encrypted at rest with AES-256 and in transit with TLS or SFTP. Plans are listed at $0.01, paid once, with a free InstantData trial account offered.
Good
- Real-time address validation
- Detects spam traps and disposable addresses
- Corrects invalid domains
- Bulk list upload and API access
- AES-256 at-rest encryption
Watch out
- Paid service
- Customer data is not backed up
- Pricing is listed per credit package
Who it suits
It suits marketers and email teams focused on deliverability, list quality, segmentation, attribution, and campaign performance. API and real-time form checks also fit workflows that validate addresses as they are collected.
Verdict
SafeToSend covers bulk, API, and real-time email validation with detailed response analysis. Its listed security controls and integrations are useful, but buyers should note the absence of customer-data backups and unspecified trial length.
Plans and prices
From AtData SafeToSend's own pricing page, checked 11 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| SafeToSend — 100,000 credits | $0.01, paid once | 100,000 credits |
| SafeToSend — 500,000 credits | $0.01, paid once | 500,000 credits |
| SafeToSend — 50,000 credits | $0.01, paid once | 50,000 credits |
| SafeToSend — 5,000 credits | $0.01, paid once | 5,000 credits |
The facts
Each one read from AtData SafeToSend's own pages, with the date it was checked.
What it does
- Certification
- The certificate states AtData LLC meets ISO/IEC 27001:2022 for client-facing services branded AtData, TowerData, and FreshAddress, excluding subsidiary Xverify.checked 11 Oct 2026
- Customer data backups
- AtData says it deliberately does not back up customer data as part of its disaster recovery approach.checked 11 Oct 2026
- Email correction
- It detects and corrects misspelled domains, extra or missing characters, and invalid domains.checked 11 Oct 2026
- Integrations
- AtData lists integrations including ActiveCampaign, AWeber, Campaign Monitor, Constant Contact, DotDigital, GetResponse, HubSpot, Klaviyo, Mailchimp, Marketo, and Salesforce Marketing Cloud.checked 11 Oct 2026
- Intended users
- The product page describes benefits for marketers seeking better email deliverability, audience segmentation, attribution, and marketing campaign performance.checked 11 Oct 2026
- Purpose
- SafeToSend uses real-time activity and engagement signals to assess whether an email address is valid and valuable for marketing.checked 11 Oct 2026
- Quality reports
- The InstantData dashboard shows data quality summaries and appends analysis using more than 35 response codes to each email on a list.checked 11 Oct 2026
- Real-time API
- The API validates email addresses as they are entered on web forms or collected in stores, with usage and results tracked in InstantData.checked 11 Oct 2026
- Security
- AtData says submitted files are encrypted at rest with AES-256 and transfers are encrypted in transit using TLS or SFTP.checked 11 Oct 2026
- Support
- AtData offers dedicated email address experts and lists a Help Center for support articles.checked 11 Oct 2026
- Threat detection
- It identifies spam traps, toxic deliverable addresses, and inactive contacts that can harm deliverability.checked 11 Oct 2026
- Ways to submit data
- Users can upload lists from a local device, via FTP, or from an email marketing platform, and can also submit files through the API.checked 11 Oct 2026
The company
- Company history
- AtData says it combines more than 25 years of email address technology experience and traces its roots to FreshAddress and TowerData.checked 11 Oct 2026
- Headquarters
- Dedham, Massachusetts, United Stateschecked 28 Sep 2026
Money
- Free access
- The site invites users to create a free InstantData account, and AtData's navigation labels its InstantData link as a free trial; no trial length is stated.checked 11 Oct 2026
Where it runs
- Machine learning
- AtData says SafeToSend analyzes approximately 100 billion monthly email activity signals and that clients report average unknown-rate reductions of 6%, with some reductions up to 29%.checked 11 Oct 2026
Alternatives to AtData SafeToSend
- 1
ZeroBounce
Free planAndroidiOSWebAPI8.1Free plan - 2
EmailOversight
Free planAndroidiOSWebAPI7.9From $70 a month - 3
Voila Norbert
Free planWebAPIExtension7.4From $19 a month - 4
VerifyAnyEmail
Free planiOSWebAPI6.9From $8.99 a month - 5
MailboxValidator
Free planWebAPI6.8Free plan - 6
Bounceless
Free planWebAPI6.7From $19 a month