Email on Acid alternatives

Resend is a developer-first email API that provides reliable transactional email delivery with a modern SDK, React email components, and detailed analytics for web application teams.

Instantly is a cold email outreach platform with unlimited sending accounts, AI-powered email warmup, lead databases, and campaign automation for sales teams and agencies scaling outbound pr…

AI-powered cold email outreach platform with unlimited warmups, provider matching, and deliverability tools to land emails in the inbox.

Global email delivery service with SMTP relay, email API, dedicated IPs, email testing tools, and comprehensive deliverability reporting.

SendGrid (by Twilio) is an email delivery platform providing transactional and marketing email APIs with deliverability tools, analytics, and template management for developers.

Brevo (formerly Sendinblue) is an all-in-one marketing platform offering email campaigns, SMS marketing, chat, CRM, and marketing automation. It provides affordable multi-channel communicati…

Amplemarket provides an all-in-one AI platform for outbound sales covering prospecting, multichannel sequences, and deliverability optimization.

Bulk email verification service that removes invalid, duplicate, spam-trap, and disposable addresses from mailing lists at scale.

Cost-effective email delivery service combining email marketing campaigns, transactional API, SMTP relay, and advanced deliverability tools.

Email verification tool offering individual and bulk validation with real-time API, catch-all detection, and disposable email checks at low cost.

Real-time email verification service with bulk list cleaning and API integrations for marketers.

Email verification service with bulk list cleaning and API for marketing teams improving deliverability.

High-volume email list verification with syntax, MX, and SMTP checks for cold email senders.

Transactional email add-on for Mailchimp customers offering templates, event tracking, and deliverability analytics.

Email warmup service that automates inbox activity to increase deliverability and sender reputation.

REST API from APILayer for real-time email address validation with syntax, MX, and SMTP checks.

Automated email warmup platform to improve sender reputation and avoid the spam folder.

Email verification service with bulk list cleaning, real-time API, and deliverability tools.

Cold email outreach tool with unlimited mailboxes, AI warmup, and multi-channel sequence automation for sales.

Email warmup, spam test, and deliverability tool with real inboxes used to improve cold email performance.

Japanese bulk email delivery platform known for high deliverability at scale.

Email verification platform with real-time API, bulk verification, and deliverability monitoring for growth teams.

AI-powered outreach tool that generates sales sequences, verifies emails, warms up domains, and tracks engagement.

AI cold email deliverability platform with automated infrastructure.