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SPECIFICTION
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Mailmark vs Nuntly

Mailmark

mailmark.dev

Nuntly

nuntly.com

Side by side

FigureMailmarkNuntly
Price from$10/mo€10/mo
Free plan—Yes
Free trialYes—
Open source——
WebYesYes
APIYesYes
Self-hostedYes—
Plans published35
Spec score · Transactional Email Software8.5 (#13)8.8 (#5)
Spec score · Transactional email services8.2 (#22)8.8 (#6)
Delivery methodsapiboth
Free planYesYes
Monthly send limit100010000
SecurityMailmark says data is encrypted in transit with TLS 1.3 and at rest with AES-256, including email content, attachments, account data, and backups.Nuntly states that data is encrypted at rest with AES-256 and in transit with TLS 1.3, with API keys hashed or encrypted and rotatable without downtime.
SupportThe documentation page says its support team typically responds within 2 hours on business days.The pricing page lists email support for Free and Starter, email plus Slack support for Scale, and priority support for Enterprise.
Template optionscodeboth

Plans

Mailmark

  • Starter$10 a month
  • Pro$50 a month
  • Business$100 a month

Mailmark pricing →

Nuntly

  • FreeFree
  • Starter€10 a month
  • Scale€68 a month
  • EnterprisePriced on request
  • FreeFree

Nuntly pricing →

In their own words

Mailmark

Mailmark has no write-up on Specifiction yet; its figures are above.

Visit mailmark.dev

Nuntly

Nuntly is a developer-focused email platform for sending and receiving transactional email, replying to messages, and tracking activity through one REST API. It supports single or bulk sends, scheduled or immediate delivery, and messages with or without templates. For inbound email, it provides custom inboxes, stored messages, thread grouping, attachment access, webhooks, and a Reply API. The REST API covers domains, API keys, webhooks, analytics, sending, receiving, and team members; documented SDKs include TypeScript and Java. Webhooks expose delivery, open, click, bounce, complaint, and inbound-message activity, with retries, replay, filtering, payload inspection, and signature verification. Logs are retained for up to 30 days. Nuntly says data is encrypted in transit and at rest, and hosted and processed in Europe by default. Its Free plan requires no card and costs nothing; it allows 3,000 emails monthly, 100 daily, one domain, and one inbox. Starter costs €10 a month and allows up to 10,000 emails monthly. Nuntly is headquartered in Châtillon, France.

Visit nuntly.com