Aster Mail vs. Spike Comparison


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About Aster Mail is a free, open-source, end-to-end encrypted email service for people who want real privacy without the technical overhead. All encryption happens on your device before anything reaches our servers, so we have zero access to your messages or metadata. Aster uses standard OpenPGP with portable RSA-4096 keys, so you're never locked in. Your keys work with GPG, Thunderbird, or any PGP client, and they're discoverable through WKD and public keyservers. Aster-to-Aster messages use a Signal-inspired X3DH and Double Ratchet protocol for forward secrecy. Every plan includes encrypted email, custom domain support, free aliases, tracker protection, and full access across web and desktop. The entire codebase is published under AGPL v3 on GitHub, fully auditable, with a public warrant canary and documented vulnerability disclosure. Free plan includes 10 GB encrypted storage, 5 aliases, and 1 custom domain. Paid plans start at $2.99/month. Servers located in Germany.	About Spike brings your entire workspace into your Inbox: email, chat, calendar, calls, team collaboration, tasks — to one powerful Inbox. Everything you need to get your work done is in a single feed, so you can finally give the app-switching a rest. Spike’s conversational email fuses traditional email with instant messaging — eliminating cluttered email threads. With real-time conversations and live collaboration, have better interactions and a more human communication experience. Spike is available on iOS, Android, Mac, Windows & Web.
Platforms Supported Windows Mac Linux Cloud On-Premises iPhone iPad Android Chromebook	Platforms Supported Windows Mac Linux Cloud On-Premises iPhone iPad Android Chromebook
Audience Privacy-conscious users	Audience Spike is an all-in-one workplace, making you and your team more responsive, efficient, and collaborative.
Support Phone Support 24/7 Live Support Online	Support Phone Support 24/7 Live Support Online
API Offers API	API Offers API
Screenshots and Videos No images available	Screenshots and Videos View more images or videos
Pricing No information available. Free Version Free Trial	Pricing Free Free Version Free Trial
Reviews/Ratings Overall 0.0 / 5 ease 0.0 / 5 features 0.0 / 5 design 0.0 / 5 support 0.0 / 5 This software hasn't been reviewed yet. Be the first to provide a review: Review this Software	Reviews/Ratings Overall 5.0 / 5 ease 4.8 / 5 features 4.8 / 5 design 4.8 / 5 support 4.6 / 5 Read all reviews
Training Documentation Webinars Live Online In Person	Training Documentation Webinars Live Online In Person
Company Information Aster Mail Founded: 2025 United States astermail.org	Company Information Spike Founded: 2014 Israel www.spikenow.com
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Letterbox	Mailbird
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Categories Email Clients Email Encryption Email Hosting	Categories Calendar Collaboration Email Clients Email Encryption Email Management Email Tracking Employee Communication Tools File Sharing Internal Communications Productivity Screen Sharing Task Management Team Chat Team Communication
	Show More Features Calendar Features Calendar Sync Collaboration Tools Multi-Device Support Reminders Room Booking Scheduling Task Manaagement Collaboration Features Brainstorming Calendar Management Chat / Messaging Contact Management Content Management Document Management Project Management Real Time Editing Task Management Version Control Video Conferencing Email Management Features Data Recovery Email Archiving Email Deletion Email Discovery Email Monitoring Email Recall Queue Manager Response Management Routing Shared Inboxes Signature Management Spam Blocker Whitelisting / Blacklisting Employee Communication Tools Features Activity / News Feed Audio / Video Conferencing Blogs Chat / Messaging Employee Directory Event Calendar File Sharing Knowledge Management Newsletter Management Surveys & Feedback File Sharing Features Audit Trail Chat / Messaging Collaboration Document Management Drag & Drop Electronic Signature Encryption File Synchronization Search User Management Version Control Workflow Management Internal Communications Features App Integration Blogs Chat/Messaging Email Management Employee Directory Event Calendar Newsletter Management Photo Gallery Social Sharing Survey Management Telephony Video Chat Voice Chat Productivity Features Collaboration Database Creation Document Creation File Sharing Notes Management Office Suite Presentation Tools Project Management Task Management Team Chat Task Management Features Collaboration Create Subtasks Gamification Gantt Charts Mobile Access Percent-Complete Tracking Progress Tracking Recurring Tasks Reporting/Analytics Spreadsheet View Task Board View Task Planning Task Scheduling Task Tracking Time Tracking To-Do List View Team Chat Features End-to-End Encryption (E2EE) File Sharing Groups / Channels Payments Search / Filter Self-Destructing Messages Stickers / GIFs Threaded Discussion Video Conferencing Voice Calling Team Communication Features Activity / News Feed Audio Calls Calendar Management Chat / Messaging Discussion Threads File Sharing Mobile Access Push Notifications Search Surveys & Feedback Task Management Video Conferencing
Integrations Desktop.com Gmail Google Workspace Microsoft 365 Microsoft Outlook OnlineOrNot	Integrations Desktop.com Gmail Google Workspace Microsoft 365 Microsoft Outlook OnlineOrNot View All 6 Integrations
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