WarmInbox
WarmInbox helps individuals and teams improve email deliverability by simulating real, human-like interactions—sending, opening, replying, clicking, and threading—to gradually build sender reputation and avoid spam folders.
Designed for marketers, founders, sales teams, and agencies, WarmInbox runs automatically in the background, warming up each email account with trusted, natural-looking activity.
Key Features:
- Automated email warm-up, Monday through Friday
- Realistic activity: opens, clicks, replies, and threads
- Live dashboard to monitor deliverability health and inbox placement
- Support for multiple inboxes and team members
- Invite teammates and manage everything from one central dashboard
- Secure setup using app passwords or OAuth
- Pause or remove campaigns anytime
- Transparent pricing with per-seat billing
Whether you're warming a new domain or trying to fix poor deliverability, WarmInbox ensures your emails land where they should—the inbox.
Learn more
Extra Thursday
Extra Thursday is an AI-powered inbox assistant that connects to your Gmail and Google Calendar (via OAuth) to transform email management into a fast, context-aware, streamlined workflow. It treats your inbox like a database: it can scan thousands of emails in seconds, extract key insights or open loops, surface important threads, and highlight action items, so you don’t have to manually sort, search, or triage messages. Extra Thursday also drafts professional replies (from polite follow-ups to technical responses), auto-generates follow-up emails, and lets you review/edit before sending, dramatically reducing the time you spend writing and replying. With deep-context AI reading and understanding entire conversations, the platform helps manage email overload and makes your inbox actionable, rather than overwhelming. Privacy-wise, emails and calendar data are only fetched on demand per session; Extra Thursday does not store your full inbox or use your content to train its models.
Learn more
Spike
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.
Learn more
SEDNA
Cut down email volume by up to 95% and get one source of truth for all conversations, data, and documentation through shared team inboxes. Unlike siloed email accounts, SEDNA gives team members controlled transparency of all correspondence, attachments, and actions taken within a project or message thread—along with quick composition and sharing capabilities—for more efficient communication and effortless collaboration. Each email within a team inbox has its own activity panel to host internal conversations, contextual data, and time-stamped activity that enables team members to work with—and around—one message in place of forwards, reply-alls, and cc’s that bloat email volume. The Activity Panel lets you see automatically generated or manually applied message details like category tags, job references, and people involved, as well as who viewed the message, who replied, and how so. And collaboration is easy with the ability to tag others and add comments for real-time discussion.
Learn more
