MailerSend

Transactional email API from the MailerLite group (Lithuania). Templates, SMTP and webhooks aimed at product and marketing mail.

Proprietary · https://www.mailersend.com · EU legal entity

Transactional email

MailerSend cloud

Hosting: EU-hosted SaaS Reviewed

EU vendor group; confirm current data-centre locations and DPA.

Fair 3.3
Easy 4.3
Secure 3.7

FES Scores 9

Pillar	Criterion	Score	Evidence
Easy	Day-one UX Can non-technical staff use it without a project?	4	MailerSend provides comprehensive documentation and API guides to facilitate quick integration and setup. Source
Easy	Operate Admin burden, updates, backups and language coverage.	4	Rule baseline (rubric_v1): vendor-operated SaaS — low ongoing ops burden for a small NGO. Source
Easy	Integrate SSO, mail/CalDAV, APIs and common NGO connectors.	5	MailerSend provides extensive API documentation, SDKs, and webhook support for seamless integration. Source
Fair	Lock-in / exit Can you leave with your data in open formats, at known cost?	3	Rule baseline (rubric_v1): EU SaaS usually allows export, but remapping integrations still costs effort. Source
Fair	Sovereignty EU legal entity, EU hosting, and exposure to extra-EU lawful access?	5	Rule baseline (rubric_v1): EU legal entity + EU-hosted SaaS offering. Source
Fair	Openness Open source or open standards? Are independent implementations possible?	2	Rule baseline (rubric_v1): proprietary / non-OSI license — openness capped unless open standards dominate. Source
Secure	IT security Authentication, encryption, patch cadence and independent audit.	4	MailerSend includes a Data Processing Addendum (DPA) outlining security commitments and compliance measures. Source
Secure	User security 2FA, roles, phishing resistance and safe defaults.	3	MailerSend offers features like SPF, DKIM, and DMARC but does not explicitly highlight advanced user-level security controls. Source
Secure	Personal data GDPR fit: DPA, residency, sub-processors and Schrems II posture.	4	Rule baseline (rubric_v1): usable DPA URL plus EU SaaS / EU legal entity and privacy page. Source

Indicative scores from public information — how we score.

Subprocessors 4

Name	Role	Residency	Verification date	Source
Postmark	Email	EU + abroad	07 Oct 2026	Source
Google Cloud Platform	Hosting	EU + abroad	07 Oct 2026	Source
Cloudflare	CDN	EU + abroad	07 Oct 2026	Source
Google Analytics	Analytics	EU + abroad	07 Oct 2026	Source