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SPECIFICTION
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Twilio Email API

twilio.com

Free plan WebAPI
Visit twilio.com
Spec score 7.4 #34 of 41 in Transactional email services

What it is

Twilio Email API lets teams add transactional and marketing email to applications and cross-channel workflows through the Twilio Console. Requests use JSON and can address one or multiple recipients; emails can be scheduled up to seven days ahead. LiquidJS templates can personalize subject, text and HTML fields, while status reporting covers sent, delivered, undelivered, opened and failed messages. Real-time email logs and deliverability tools are included. Requests with attachments have a 10 MB limit and can include no more than 10,000 recipients. The listed pay-as-you-go plan costs nothing, billed per email sent at $0.0013 per email, with no monthly base fee, feature tiers or overage charges. A 30-day free trial offers 100 free emails per day. The API is listed for web and API use, with delivery by API; templates are listed as both and delivery logs are retained for 7 days. Twilio says Email and SendGrid are separate products built on the same email infrastructure, with SendGrid intended for high-volume transactional and marketing email.

Spec sheet

Purpose
Twilio Email lets teams add transactional email to applications and existing cross-channel workflows through the Twilio Console.Read 11 Oct 2026 · twilio.com
Trial
New users can try Twilio Email for 30 days with 100 free emails per day.Read 11 Oct 2026 · twilio.com
Security
Twilio SendGrid lists SPF, DKIM, DMARC, and TLS encryption among its email security features.Read 11 Oct 2026 · twilio.com
Support
Twilio SendGrid says its email experts can help with setup, troubleshooting, deliverability, and open rates.Read 11 Oct 2026 · twilio.com
Headquarters
San Francisco, California, United StatesRead 28 Sep 2026 · twilio.com
Founded
2008Read 28 Sep 2026 · twilio.com
API use
The Email API sends transactional and marketing emails to one or multiple recipients using a JSON request.Read 11 Oct 2026 · twilio.com
Billing
Twilio Email charges a flat $0.0013 per email sent, with no monthly base fees, feature tiers, or overage charges.Read 11 Oct 2026 · twilio.com
Company history
Twilio says it was founded in 2008 to simplify telecommunications and bring communications to the cloud.Read 11 Oct 2026 · twilio.com
Developer access
Twilio SendGrid Email API supports RESTful APIs and SMTP relay, with programming-language libraries and interactive documentation.Read 11 Oct 2026 · twilio.com
Monitoring
The API reports email statuses including sent, delivered, undelivered, opened, and failed.Read 11 Oct 2026 · twilio.com
Personalization
The API supports LiquidJS templating in the subject, text, and HTML fields.Read 11 Oct 2026 · twilio.com
Product distinction
Twilio says Twilio Email and Twilio SendGrid are separate tools built on the same email infrastructure; SendGrid is its platform for high-volume transactional and marketing email.Read 11 Oct 2026 · twilio.com
Request limits
A request including attachments is limited to 10 MB and 10,000 total recipients.Read 11 Oct 2026 · twilio.com
Scheduling
Emails can be scheduled up to seven days in advance.Read 11 Oct 2026 · twilio.com
Sending and tracking
It provides high-deliverability infrastructure to send and track transactional emails, with real-time email logs and deliverability tools.Read 11 Oct 2026 · twilio.com

Plans and prices

Twilio Email free trial Free 30 days · 100 free emails per day Read 11 Oct 2026 · twilio.com
Twilio Email pay-as-you-go Free per email sent No monthly base fee · No feature tiers · No overage charges Read 11 Oct 2026 · twilio.com

Every Twilio Email API plan and price →

Strong points and limits

Strong points

  • JSON API supports one or multiple recipients
  • Schedule emails up to seven days ahead
  • LiquidJS templating for subject, text and HTML
  • 30-day trial includes 100 free emails per day

Limits

  • Attachment requests limited to 10 MB
  • Maximum 10,000 recipients per request
  • Delivery logs retained for 7 days

Who it suits

It suits teams adding programmable transactional or marketing email to applications and existing workflows. The stated limits and per-email charge are relevant when planning message volume and attachments.

Verdict

Twilio Email combines API-based sending, scheduling, templates and status reporting with a per-email charge and no monthly base fee. Note the request limits and distinguish it from Twilio SendGrid when assessing fit.

Where Specifiction places it

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