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Head-to-head · Transactional Email Software

Twilio SendGrid vs Mailchimp Transactional (formerly Mandrill)

  • Updated Sep 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Twilio SendGrid #1 in Transactional Email Software 9.3/10 From $19.95/mo · 60-day trial ✓ 1 of 2 features Try Twilio SendGrid
Mailchimp Transactional (formerly Mandrill) #3 in Transactional Email Software 8.3/10 From $20 ✓ 2 of 2 features Visit Mailchimp

Twilio SendGrid leads on 0 checks, Mailchimp Transactional (formerly Mandrill) on 1, and 2 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreTwilio SendGrid · 9.3/10
  • Most featuresMailchimp Transactional (formerly Mandrill) · 2 of 2

Twilio SendGrid scores higher on our rubric for transactional email software: 9.3 against 8.3 out of 10; our editors rank them #1 and #3.

Mailchimp Transactional (formerly Mandrill) offers event webhooks; Twilio SendGrid doesn't publish it.

Twilio SendGrid is the better fit for established developers needing broad SDK coverage. Mailchimp Transactional (formerly Mandrill) is the better fit for high-volume transactional sending with predictable blocks.

  • Twilio SendGrid fits best

    Established developers needing broad SDK coverage

  • Mailchimp Transactional (formerly Mandrill) fits best

    High-volume transactional sending with predictable blocks

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. It never changes our verdict. How we rank.

Side by side

Feature Twilio SendGrid 9.3/10 Visit ↗ Mailchimp Transactional (formerly Mandrill) 8.3/10 Visit ↗
At a glance
Editor score 9.3 8.3
Ranking #1 in Transactional Email Software #3 in Transactional Email Software
Best for Established developers needing broad SDK coverage High-volume transactional sending with predictable blocks
Pricing model Paid Paid
Starting price $19.95/mo Not published
Free plan — —
Free trial — —
Deployment Cloud Cloud
Platforms Web Web
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Twilio SendGrid 1/2 · Mailchimp Transactional (formerly Mandrill) 2/2
Event webhooks Not published ✓ (best)
Dedicated IP option ✓ ✓
Specs
Delivery methods Not published Both
Template options Not published Both
Delivery log retention Not published 30 days
Monthly send limit Not published 25000 emails/mo
Our review
Pros
  • REST API, SMTP relay, and official libraries for seven languages
  • Inbound parsing and event webhooks cover two-way email workflows
  • Templates, analytics, shared IPs, and dedicated IPs support delivery operations
  • Supports both transactional API and SMTP sending
  • Includes templates, dynamic content, webhooks, and inbound processing
  • Per-block pricing falls from $20 to $10 at 161+ blocks
Cons
  • No free plan beyond the 60-day trial
  • Paid pricing varies by monthly volume and selected features
  • Dedicated IP availability starts with the Pro plan
  • No permanent free plan
  • Requires a Mailchimp account
  • Email content is retained for 30 days
Our verdict

Twilio SendGrid is a cloud email delivery service for developers and organizations sending transactional or application email. Its core delivery options include a RESTful Email API and SMTP relay, while dynamic templates, personalization…

Read the review →

Mailchimp Transactional, formerly Mandrill, is a cloud email delivery service for developers sending personalized, event-driven messages. Its use cases include password resets, order confirmations, welcome emails, and outage alerts.…

Read the review →
  1. Twilio SendGridTransactional Email Software 9.3From $19.95/mo · 60-day trial
  2. Mailchimp Transactional (formerly Mandrill)Transactional Email Software 8.3From $20

Strengths and trade-offs

  • Twilio SendGrid — where it wins

    • REST API, SMTP relay, and official libraries for seven languages
    • Inbound parsing and event webhooks cover two-way email workflows
    • Templates, analytics, shared IPs, and dedicated IPs support delivery operations

    Where it doesn't

    • No free plan beyond the 60-day trial
    • Paid pricing varies by monthly volume and selected features
    • Dedicated IP availability starts with the Pro plan

  • Mailchimp Transactional (formerly Mandrill) — where it wins

    • Supports both transactional API and SMTP sending
    • Includes templates, dynamic content, webhooks, and inbound processing
    • Per-block pricing falls from $20 to $10 at 161+ blocks

    Where it doesn't

    • No permanent free plan
    • Requires a Mailchimp account
    • Email content is retained for 30 days
  • Twilio SendGrid9.3/10 · From $19.95/mo · 60-day trial

    A developer-focused email service with APIs, SMTP, templates, webhooks, and inbound parsing.

    Try Twilio SendGridFull verdict →
  • Mailchimp Transactional (formerly Mandrill)8.3/10 · From $20

    A paid transactional email service with API, SMTP, templates, and volume pricing.

    Visit MailchimpFull verdict →

More comparisons

All transactional email software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated · How we research and update