Gmail API Alternatives & Competitors

EmailEngine is an email client but for apps, not people. It connects to the user's email server, translates REST API requests from the app to IMAP and SMTP commands, and sends webhooks for changes like new or deleted emails.

Key EmailEngine App features:

Ease of Integration Unified API Real-time Email Processing Comprehensive Documentation

Open Source paid Free Trial $995.0 / Annually (Unlimited self hosted instances)

Team communication app now supporting FB, Twitter & SMS.

Key Missive features:

Team chat Team inbox (email, SMS, etc.) Rules & automation

freemium $14.0 / Monthly (^ 6 months history)

Enterprise Email Warmup. Sender Domain Reputation Repair Tool to get out of spam and see open rates more than double in 4 to 14 days. We engage with your emails to teach mailbox providers not to send your email to the spam or the promotions folder.

Key InboxAlly features:

Increase deliverability on any platform Create multiple sender profiles to accomodate all of your domains/IPs Works with any email sending service Use your own content in emails you send

Try for free paid Free Trial $149.0 / Monthly (Send to 100 of our unique seed emails per day)

Enterprise Email Warmup. Sender Domain Reputation Repair Tool to get out of spam and see open rates more than double in 4 to 14 days. We engage with your emails to teach mailbox providers not to send your email to the spam or the promotions folder.

Key InboxAlly features:

Increase deliverability on any platform Create multiple sender profiles to accomodate all of your domains/IPs Works with any email sending service Use your own content in emails you send

Try for free paid Free Trial $149.0 / Monthly (Send to 100 of our unique seed emails per day)

Unprivileged sandboxing tool.

Key Bubblewrap features:

Security Isolation Lightweight Flexibility

Pro developers get assurances. OSS maintainers get paid.

Key The Tidelift Subscription features:

Security Maintenance Legal Assurance Centralized Management

Your email with an assistant built in.

Key Edison Mail features:

User-friendly Interface Unified Inbox Intelligent Features Privacy Protection

eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat. .

Key eM Client features:

Email Calendar Task management Events

freemium

Get paid to build what you love on GitHub.

Key GitHub Sponsors features:

Financial Support Community Engagement Visibility and Promotion Flexible Sponsorship Options

Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

Key Microsoft Outlook features:

Integration with Microsoft Ecosystem Calendar and Task Management Strong Security Features Customizable Interface

Email marketing software made for cold email marketing professionals. Using advanced AI to generate email personalization in seconds.

Key Nureply features:

Single Contact Personalization CSV File Bulk Personalization Website based personalization LinkedIn based personalization

paid Free Trial $99.0 / Monthly (Starter)

Turn your transactional emails into marketing opportunities.

Key Spently features:

Easy-to-Use Interface Personalization Options Integration with Shopify Analytics and Reporting

Secure email with absolutely no compromises. Get your free encrypted email account today.

Key ProtonMail features:

End-to-End Encryption Zero Access to User Data Swiss Privacy Laws Open Source

freemium €5.0 / Monthly (user - 5 GB)

Send emails that get replies 💌.

Key lemlist features:

Personalization Automation Deliverability Integrated CRM