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Head-to-head · Email APIs

Mailjet vs Plunk

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score Mailjet #3 in Email APIs 9.1/10 Free plan · 30-day trial Free planFree trial✓ 0 of 5 features Visit Mailjet
Plunk #6 in Email APIs 8.6/10 Free plan · paid from $0.00 Free plan✓ 4 of 5 features Visit Plunk

Mailjet leads on 0 checks, Plunk on 0, and 5 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreMailjet · 9.1/10
  • Free planboth
  • Free trialonly Mailjet
  • Most featuresPlunk · 4 of 5

Mailjet scores higher on our rubric for email apis: 9.1 against 8.6 out of 10; our editors rank them #3 and #6.

Mailjet is the better fit for marketing teams needing email automation breadth. Plunk is the better fit for open-source teams needing flexible email workflows.

  • Mailjet fits best

    Marketing teams needing email automation breadth

  • Plunk fits best

    Open-source teams needing flexible email workflows

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. How we rank.

Side by side

Feature Mailjet 9.1/10 Visit ↗ Plunk 8.6/10 Visit ↗
At a glance
Editor score 9.1 8.6
Ranking #3 in Email APIs #6 in Email APIs
Best for Marketing teams needing email automation breadth Open-source teams needing flexible email workflows
Pricing model Free plan + paid Free plan + paid
Starting price Free plan · 30-day trial Free plan · paid from $0.00
Free plan ✓ ✓
Free trial 30 days —
Deployment Cloud Cloud, Self-hosted
Platforms Web Web
Support Live chat, Phone, Tickets, Docs Email, Community, Docs
Compliance SOC 2, ISO 27001, GDPR, HIPAA, PCI DSS, SSO/SAML GDPR
Integrations 100+ integrations 4 integrations
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market
Features Mailjet 0/5 · Plunk 4/5
Inbound email Not checked yet ✓ (best)
Delivery event webhooks Not checked yet ✓ (best)
SMTP relay Not checked yet ✓ (best)
Email templates Not checked yet ✓ (best)
Dedicated IP option Not checked yet Not checked yet
Specs
Monthly send limit 8000 /mo Not checked yet
Our review
Pros
  • Free plan includes APIs, SMTP Relay, webhooks, and an advanced editor
  • Combines automation, segmentation, A/B testing, landing pages, and analytics
  • Supports integrations including HubSpot, Shopify, WordPress, and Google Cloud
  • REST API, SMTP relay, and inbound email processing
  • Workflows, campaigns, templates, segmentation, and analytics
  • Free tier plus Docker Compose self-hosting
Cons
  • Its broad marketing feature set can dilute the core API focus
  • The Free plan provides basic statistics rather than advanced reporting
  • Automation, A/B testing, and landing pages are highlighted on Premium 15k
  • Free plan is limited to 1,000 emails per month
  • Paid cost varies with email volume
  • Self-hosting requires Docker Compose setup
Our verdict

Mailjet combines email marketing and transactional email delivery for marketing teams, developers, small and medium-sized businesses, and enterprises. Its web and API offering covers campaign creation, reusable templates, contact…

Read the review →

Plunk is an open-source email platform for developers and teams managing transactional email, marketing campaigns, workflow automation, and contact operations. It combines REST API sending, SMTP relay, inbound email processing, reusable…

Read the review →
  1. MailjetEmail APIs 9.1Free plan · 30-day trial
  2. PlunkEmail APIs 8.6Free plan · paid from $0.00

Strengths and trade-offs

  • Mailjet — where it wins

    • Free plan includes APIs, SMTP Relay, webhooks, and an advanced editor
    • Combines automation, segmentation, A/B testing, landing pages, and analytics
    • Supports integrations including HubSpot, Shopify, WordPress, and Google Cloud

    Where it doesn't

    • Its broad marketing feature set can dilute the core API focus
    • The Free plan provides basic statistics rather than advanced reporting
    • Automation, A/B testing, and landing pages are highlighted on Premium 15k

  • Plunk — where it wins

    • REST API, SMTP relay, and inbound email processing
    • Workflows, campaigns, templates, segmentation, and analytics
    • Free tier plus Docker Compose self-hosting

    Where it doesn't

    • Free plan is limited to 1,000 emails per month
    • Paid cost varies with email volume
    • Self-hosting requires Docker Compose setup
  • Mailjet9.1/10 · Free plan · 30-day trial

    A broad email platform combining APIs, automation, campaigns, and collaboration.

    Visit MailjetFull verdict →
  • Plunk8.6/10 · Free plan · paid from $0.00

    A flexible email API with workflows, inbound processing, and self-hosting.

    Visit PlunkFull verdict →

More comparisons

All email APIs comparisons → · Full ranking →

Guides on email APIs

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update