Superhuman

Superhuman is the email business founded by Rahul Vohra whose AI products expanded from writing and summarizing messages to organizing inboxes and preparing contextual replies. Following its acquisition by Grammarly, the email app became Superhuman Mail in October 2025, while its parent, formerly Grammarly, adopted the Superhuman name. In July 2026, Mail introduced Auto Drafts 2.0, which prepares replies using inbox, calendar, and web context for users to edit and send.[2][7][6][8]

Rahul Vohra announced Superhuman AI on May 3, 2023. Powered by ChatGPT, it turned short phrases into emails, matched voice and tone from previously sent messages, edited writing, summarized conversations, and answered research questions. Access rolled out in waves after the announcement.[2][3]

In his account of the development effort, Vohra credited President Paul Teyssier with helping devise “theta mode”: an executive joined the project team as an individual contributor, providing daily guidance and feedback. The AI team included one designer, one marketer, and several engineers, with Vohra contributing across product, design, engineering, and marketing. He reported that the team reached launch in less than three months.[3]

The team deliberately began with on-demand tasks—such as summarizing a selected conversation or editing a draft—rather than automatically generating summaries and replies. Vohra explained that explicit requests bounded running costs by usage and let the team iterate without automatically displaying results in the interface. Automatic features would need a higher quality threshold because poor summaries or prewritten drafts could cause users to ignore or disable them.[3]

Vohra used his May 3 appearance at Web Summit Rio to arrange a press conference and establish an external launch deadline. To meet it, the team changed its usual demonstration process: the launch video showed real AI results through a Figma recreation animated in After Effects, rather than a recording of the working product. During the subsequent weekly access waves, Vohra used a ten-minute Loom walkthrough to teach users how to invoke the features; each wave brought new cases to improve.[3]

The February 2025 evolution of Superhuman AI expanded into automatic inbox organization. Auto Labels classified incoming messages, while Auto Archive could remove marketing, cold pitches, and social-network updates from the inbox. Users could define custom labels with prompts such as “job applications” or “requests to review work,” then create a Split Inbox tab containing messages that matched the prompt.[7]

Auto Reminders set reminders for emails needing a response and prepared follow-ups when those reminders returned. Auto Drafts initially focused on follow-up replies. Personalization also became recipient-specific: the system used the tone, length, and structure of earlier emails to each person. Automatic sending of follow-ups was described as forthcoming.[7]

Auto Drafts 2.0, introduced July 14, 2026, followed the earlier follow-up and scheduling drafts with drafts for every message needing a reply. It could retrieve information from other emails, insert calendar availability, research online, and adapt to the user's style for the recipient. Users could add preferences such as avoiding Wednesday meetings and supply reference files and links through a Knowledge Base shared across their team. Auto Drafts were available on Business and Enterprise plans; connections to Slack, CRM systems, and meeting notes remained planned.[8]

At the July 2026 announcement, Superhuman reported that 40% of Auto Drafts were sent within one day, 60% were sent unedited, and users saved nine minutes per draft. The company did not specify the measurement period, sample, or methodology for those figures.[8]

On July 1, 2025, Superhuman announced its acquisition by Grammarly, with plans to build an AI-native productivity suite. Vohra outlined deeper investment in email and AI, connected calendar and task experiences, and agents that could triage messages, draft replies, surface insights, and schedule meetings. These were roadmap ambitions in the announcement.[5]

Vohra recalled first meeting Coda cofounder Shishir Mehrotra in 2017 while onboarding him onto Superhuman. As Mehrotra closed Gmail, Vohra noticed another tab containing an app called Krypton and received a demonstration; Krypton later became Coda. Grammarly acquired Coda in late 2024, and Mehrotra became Grammarly's CEO.[5]

By the October 29, 2025 renaming announcement, the acquisition had occurred. The initial suite comprised Superhuman Mail, Coda's team workspace, Grammarly's writing assistant, and Superhuman Go, described as a proactive AI companion working across apps. A single subscription for Mail customers was still forthcoming. Mail had meanwhile shipped improvements including an Ask AI upgrade, smarter Auto Labels, archive controls, and Auto Drafts for Scheduling.[6]

Before the AI launch and acquisition, Superhuman had financed plans to expand its email product across platforms and into writing assistance. Its 2021 financing announcement provides the earlier context for those product priorities.[4]

On August 4, 2021, Superhuman announced that it had raised a $75 million Series C led by IVP, with Tiger Global participating. IVP General Partner Ajay Vashee was joining its board. The company earmarked the financing for expansion to Outlook and Android users, writing assistance, task management, integrations, and enterprise use.[4]

Superhuman reported cumulative customer activity of over 100 million messages sent, over 335 million conversations triaged, and over one billion keyboard shortcuts used in August 2021. By its July 2025 acquisition announcement, it reported over 500 million messages, over two billion conversations, and six billion shortcuts. These figures describe activity in the email product, rather than customer counts or the renamed parent's broader user base.[4][5]