What Is Resend? The Developer Email Platform Explained
Resend is an email API for developers, now with Inboxes and its own mail server. What it does, what it costs, where it fits, and how to connect it to Carly.
Transactional Email
13 posts
Amazon SES Pricing 2026: Plans, Inbound and Hidden Costs
Amazon SES pricing, October 2026: $0.10 per 1,000 à la carte, $0.16 on the new default Essentials plan, plus inbound, dedicated IP, VDM and free tier costs.
9 Best Email APIs in 2026 (Free Tiers Compared)
The 9 best email APIs for developers in 2026: free tiers, real prices, and which can receive and reply as well as send transactional email.
Mailgun Pricing 2026: Free Tier, Plans and Overages
Mailgun pricing, October 2026: the 100-a-day free tier, Basic at $15, Foundation at $35, Scale from $90, overage per 1,000, dedicated IPs and add-ons.
7 Best Mailgun Alternatives in 2026 (Prices Compared)
Leaving Mailgun over overage you can't switch off, 1-day logs or a sandboxed free plan? 7 Mailgun alternatives compared on price, retention and inbound.
7 Best Resend Alternatives in 2026 (Prices Compared)
Leaving Resend? 7 alternatives compared on price, React Email support and receiving mail, with Loops vs Resend, Plunk, Postmark and CarlyEmail.
Resend Pricing 2026: Free Tier, Plans and Real Costs
Resend pricing, October 2026: the free tier and its 100/day cap, Pro from $20, Scale from $90, overages, dedicated IPs, and why inbound mail counts.
8 Best SendGrid Alternatives in 2026 (Prices Compared)
SendGrid dropped its free plan and support complaints keep piling up. 8 SendGrid alternatives compared on free tiers, real prices, and receiving mail.
SendGrid Pricing 2026: Plans, Free Trial and Real Costs
SendGrid now starts with a 60-day trial, then $19.95/mo for 50,000 emails. Every Email API and Marketing plan, overages, IP add-ons, and costs at 10k-100k.
SendGrid vs Mailgun 2026: Price, Inbound, Logs, Support
SendGrid vs Mailgun, October 2026: cost at 10k, 50k and 100k emails, deliverability tools, Inbound Parse vs Routes, logs, support, and Amazon SES.
ChatGPT + MailerSend: What the Integration Can (and Can't) Do in 2026
MailerSend's official MCP connects to ChatGPT with OAuth and 90+ tools, including real email sending. What the chatgpt mailersend integration covers.
ChatGPT + Postmark: What the Integration Can (and Can't) Do in 2026
Postmark's official MCP server is local-only, so ChatGPT has no plug-and-play route. What actually works for the chatgpt postmark integration in 2026.
How to Connect Postmark to an AI Agent
Connect Postmark to your Carly AI agent and send transactional emails, pull delivery stats, investigate messages, and monitor bounces — all through email or chat commands.