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www.mailersend.com/pricingTransactional senderemail/mailersendJSONcomparereport an errorprovider JSON

Free allowance
500 emails/month on the Free plan once the account is approved, with a daily quota of 100 API and SMTP relay requests; 1 domain, 1 API token, 1 webhook, 1 template
Verdict
fails: quotathe free allowance is too small to matter
Cost
free tier
Identity
cardcard required, no phone
Binding limit
request-rate500 emails per month; 100 API or SMTP relay requests per day on the Free plan; every request counts against the quota, which resets at midnight UTC
Evidence
documented32 sources; a first-party page was read and the sentence quoted
Freshness
stale on 2026-12-05checked 2026-11-04 (live); stale on 2026-12-05
Free tier500 emails/month on the Free plan once the account is approved, with a daily quota of 100 API and SMTP relay requests; 1 domain, 1 API token, 1 webhook, 1 template
unit requests; metered on request-count; Sandbox mode, open with no payment method, gives 100 emails a month with a cap of 100 API requests a day, to any 2 recipients until the account is approved, with no time limit
Pricenone stated
Limits
  • request-rate (binding) 500 emails per month source
  • request-rate (binding) 100 API or SMTP relay requests per day on the Free plan; every request counts against the quota, which resets at midnight UTC source
counts of things, not rates, so no vocabulary kind names them: 1 sending domain, 1 API token, 1 webhook, 1 template. The daily 100 is a quota of API and SMTP relay requests on the rate-limit, SMTP relay and developer pages and in the plans table (Daily API requests), and the plans help page prose calls it a daily limit of 100 emails; how many emails one request may carry on the Free plan is not stated
Identitycard signup needs an email address, confirmed from a verification email sent to that address; approval then asks for details of the company or organization and how the service will be used, and takes up to 48 hours; Sandbox mode needs no payment method; the Free plan is subscribed on the Plan and billing page with an organization address and credit card information, after the account is approved, and is not charged
Egressnot applicable: an outbound sender
Retention1-day activity data retention on the free plan (1 days)
Interfacerest the MailerSend email API and SMTP relay
Toolingcurl, any SMTP client
Composes withcomposes with a domain and with nothing that needs volume.
Reliabilitysending pauses when the monthly limit is reached and resumes when the 30-day period resets; the Free plan allows no extra usage
NotesThe 14-day Professional trial at the top of the pricing page needs a payment method and ends on the Free plan; Sandbox mode needs no payment method.
Parsed numbers
  • has-free-tier 1
Evidence 32
datesourcewhat it proved
2026-10-22www.mailersend.com/pricingthe Free column reads '500 emails /month', 1 domain, 1-day retention and '100' daily API requests
2026-10-22probe: smtp://smtp.mailersend.net:587banner 250, STARTTLS completed and AUTH LOGIN returned 334; EHLO advertises 8BITMIME and no SIZE extension
2026-10-30www.mailersend.com/help/plans-features-and-limitsthe Free plan sends 500 emails a month after approval, with a daily limit of 100
2026-10-30www.mailersend.com/help/sandbox-mode-and-the-professional-trSandbox mode sends 100 emails a month, to 2 recipients until approval
2026-10-30www.mailersend.com/pricingthe Free plan needs an organization address and a credit card on file
2026-10-30www.mailersend.com/help/plans-features-and-limitsthe Free plan keeps activity data 24 hours
2026-10-30www.mailersend.com/help/plans-features-and-limitssending pauses at the limit until the 30-day period resets
2026-10-30www.mailersend.com/help/plans-features-and-limitsthe plans help page calls the daily 100 a limit of emails
2026-10-30www.mailersend.com/help/sandbox-mode-and-the-professional-trthe 14-day trial ends on the Free plan
2026-10-30www.mailersend.com/pricinga card is asked for the Free plan and is not charged
2026-10-31probe: smtp.mailersend.net:587the MailerSend SMTP relay answers on port 587 with a 220 ESMTP banner
2026-10-30www.mailersend.com/pricingthe Free plan sends 500 emails a month
2026-10-31www.mailersend.com/pricingthe pricing page, the free tier's source_url, states the 500-email Free plan when read on 2026-10-31
2026-10-31www.mailersend.com/help/plans-features-and-limitsthe Free plan sends 500 emails a month after approval, with a daily limit of 100
2026-10-31www.mailersend.com/pricingthe Free plan allows 100 requests a day, 1 domain, 1 API token, 1 webhook and 1 template
2026-10-31www.mailersend.com/help/plans-features-and-limitsthe Free plan column (first) keeps activity data 24 hours
2026-10-31www.mailersend.com/pricingthe Free plan needs an organization address and a credit card on file
2026-10-31www.mailersend.com/help/plans-features-and-limitssending pauses at the limit until the 30-day period resets
2026-10-31www.mailersend.com/help/sandbox-mode-and-the-professional-trSandbox mode sends 100 emails a month with a cap of 100 API requests a day
2026-10-31www.mailersend.com/help/sandbox-mode-and-the-professional-trthe 14-day Professional trial needs a payment method and Sandbox mode is the alternative without one
2026-11-02www.mailersend.com/help/smtp-relaythe Free plan's daily quota is 100 requests, counted for the API and the SMTP relay
2026-11-02www.mailersend.com/help/rate-limits-how-to-reduce-403-422-42every API or SMTP relay request counts against the daily request quota, which resets at midnight UTC
2026-11-02www.mailersend.com/help/rate-limits-how-to-reduce-403-422-42the daily request quota table lists 100 requests a day for the Free plan
2026-11-02www.mailersend.com/help/smtp-relayevery API or SMTP relay request counts against the daily quota, which resets at midnight UTC
2026-11-02developers.mailersend.com/general.htmlthe developer documentation counts the daily quota in API and SMTP relay requests
2026-11-02www.mailersend.com/help/getting-startedsignup is confirmed by a verification email sent to the address given
2026-11-02www.mailersend.com/help/getting-startedaccount approval asks for details of the company or organization and the planned use
2026-11-02www.mailersend.com/help/getting-startedaccount approval can take up to 48 hours
2026-11-02www.mailersend.com/help/getting-startedthe payment method is asked only for the 14-day Professional trial, and skipping it leads to Sandbox mode
2026-11-02www.mailersend.com/help/getting-startedthe getting-started guide was captured on 2026-11-02 and states the signup step the record cites
2026-11-02www.mailersend.com/help/smtp-relaythe SMTP relay help page still lists a Free plan quota of 100 requests a day
2026-11-04www.mailersend.com/pricingthe Free plan is 500 emails a month, unchanged
More fields 1
stale after days90