Supafax

An AI assistant that lives inside Gmail and Outlook and handles email for you based on your tone of voice

Email service Email AI Assistant

https://supafax.com/

Visit Website

In-depth Report

Supafax is an AI email assistant that lives directly inside Gmail and Outlook. It does three things: draft responses according to your tone, take over the back-and-forth of meeting schedules, and automate your inbox by setting rules in plain English. It doesn't have the idea of "changing to a smarter mailbox". Instead, it works closely with your existing inbox and only sends email reminders when you need to make a decision. The product was founded by Rohan Mahendraker and Anton Muratov and belongs to the YC 2026 Winter Class (W26). It was listed on Product Hunt on June 30, 2026, receiving 230 votes and ranking 5th that day. The real opponent it faces is not Superhuman or Fyxer, but Gemini and Copilot, which will be built natively into Gmail and Outlook.
The origins of Supafax are very personal. According to a review article related to Product Hunt on LinkedIn, Rohan Mahendraker watched his girlfriend spend a lot of time being consumed by email and calendar administrative tasks for three years, so he and Anton Muratov became such an assistant. The original intention was to "get rid of those annoying administrative tasks for her." The two entered Y Combinator's 2026 winter class (W26) with their projects, and received YC's endorsement very early. This Product Hunt release has a noteworthy signal: the product hunter is Garry Tan—the current president of YC himself. In the context of Product Hunt, a well-known hunter’s personal exit often means some kind of endorsement of quality, and also shows that the team’s resource mobilization ability in the YC circle is not weak. On the day of release, Supafax received 230 votes, 86 comments, and ranked 5th on the daily list. It was also pushed by Product Hunt to three hot topics: Email (36,700 followers), Productivity (655,700 followers), and Calendar (32,000 followers). The competitive environment was quite crowded.
Supafax's core positioning is "Emails are done for you". It doesn't require you to migrate to a new client, but runs directly in your Gmail or Outlook after an authorized connection. Specific abilities can be broken down into several pieces. The first piece is the draft. It reads your past emails to learn tone, and produces replies that sound like you wrote them yourself. You review them in your inbox and send them if they feel ok. An example given casually on the official page is: "Sarah, two o'clock on Thursday afternoon is great. I have attached the quotation and sent the calendar invitation. I look forward to the call." The second piece is meeting scheduling. As long as you CC Supafax in the email thread, it will automatically look through the schedules of both parties, pick a time, confirm the details, and send calendar invitations, taking care of the four or five emails that originally took place. The third piece is automation rules. You just speak human words, there is no need to set up triggers, configure pages, or write code. For example, "Mark all emails from Y Combinator as investors and add stars." Supafax will reply to you with a confirmation first, and then activate it on the spot. After that, every hit email will be automatically processed. You can reply to the email at any time if you want to change or delete it. The fourth block is daily routine. Morning briefings, Friday weekly reports, and scheduled reminders can all be set. One rule demonstrated on the page is "Every working day at 9 a.m., send me a summary of last night's important threads and the content that needs to be responded to." Supafax confirms and replies with "It has been scheduled and will be run for the first time at 9 a.m. tomorrow morning." The fifth block is "Ask your inbox anything" exclusive to Professional - ask your inbox anything directly in natural language. Compared with competing products, the most different thing about Supafax is that it “doesn’t let you learn new things.” The logic of products such as Superhuman, HEY, and Fyxer is "Come and use my new email address." However, the logic of Supafax is "Your original email address is enough, I will live in it." Someone in the Product Hunt comments made a good point: most email AIs want you to migrate your entire workflow to their interface, and migration is where adoption dies; staying in Gmail/Outlook and only pinging you with emails when needed is a smarter UX trade-off. Officials also use real-time figures such as "5 hours and 42 minutes saved this week" to strengthen the promise of "saving 2 hours a day."
Supafax does not have a permanent free version, but uses a paid subscription plus a free trial. The Professional plan is priced at $35 per user per month (an early page listed it at $50, then dropped to $35) and includes drafting, tagging, meeting scheduling, inbox Q&A, custom automation rules, and priority support. Enterprise offers a customized offer for businesses, layering Professional with a dedicated account manager, marketing support, customized onboarding, custom integrations, and SSO, SCIM, and custom security controls. The customer acquisition front-end has a 14-day free trial and no credit card required. This pricing is on the premium side in the AI email assistant track: Superhuman has long been priced at $30/month, and Supafax’s $35 is in the same range. The target is obviously professionals and teams who are willing to pay a premium to “save time” and are satisfied with the native Gmail/Outlook experience and are unwilling to change clients.
Feedback on Product Hunt is generally positive, with a tone dominated by curiosity and anticipation. Some people directly say that "there are no new applications to learn", which is underestimated; others are worried about whether the quality of the draft can keep up in the early stage - after all, it is not familiar with your voice at the beginning. Does it just draft it from the beginning, or does it have a confidence threshold and is not sure enough, so it just marks it and does not ghostwrite it? This is a point that has been asked repeatedly. Some people are also concerned about whether it can distinguish the tone by contact: the style of writing to the team is very different from that of writing to investors, and most tools will suppress the voice into the same tone. From the data, the magnitude of 230 votes and 86 comments shows that the product hook is strong enough and the topic is not low. However, the proportion of comments saying "I want to give it a try" and "curious about how it is better than Superhuman/Fyxer" is quite high, so it is still early for the real reputation of long-term use.
From an industry perspective, Supafax is basically classified into the "inbox native AI assistant" group, alongside Spike (turns email into a chat interface), HEY (filtering + workflow), Missive, Shortwave, etc., but Supafax's selling point is "traditional email client experience + no need to move home." The most important external variable to keep an eye on is the fate of the platform itself. Google's Gemini and Microsoft's Copilot are being shoehorned into native Gmail and Outlook interfaces, and they're free, require zero setup, and already hold your email. Product Hunt’s review article puts it bluntly: Supafax must be significantly better than the free assistant that will come with your inbox, otherwise the living space will be compressed. In other words, its moat is not data or network effects, but the poor experience of "doing the job where email is supposed to be, and doing it better than the native assistant."
Privacy is an unavoidable issue. If Supafax wants to learn your tone of voice, arrange your meetings, and read historical emails, it must have access to the email content and history. The official FAQ states that "your emails will not be stored", and LinkedIn review also emphasizes this point; however, third-party reviews such as aipure clearly indicate that it requires access to email content and history, which is a hidden danger for privacy-sensitive individuals or companies. There is a tension here: you have to read history to learn the tone, but you also have to declare that it will not be stored. It is difficult for users to verify the specific boundaries of implementation. It is recommended that enterprise customers ask clearly about the data retention, encryption and deletion strategies before adopting it. Be careful with boundaries of autonomy, too. Questions like "Will Supafax send external emails or delete my emails?" appear in the FAQ, which shows that users are naturally worried that it has too much authority and its actions are irreversible. Once something goes wrong in automatic scheduling and automatic drafting (sending to the wrong person, writing the wrong commitment), who is responsible and whether it can be withdrawn are all real risks. In addition, the quality of early drafts depends on the volume and pattern clarity of historical emails; users with few emails or erratic styles may have a compromised experience during the cold start phase. Moreover, it does not have a permanent free version, and $35/month is not friendly to light users. If the team wants to scale up, it must go to Enterprise to talk about customization.
Who is it suitable for: Professionals, founders and small teams who rely heavily on email and are already accustomed to Gmail/Outlook and are unwilling to learn another client to "manage email"; people who are burdened by scheduling and drafting every day and want to "run their email by themselves". Who it is not suitable for: Large enterprises with zero tolerance for email content leakage and strict compliance requirements (you should go to Enterprise first and review the security terms); light users with small email volume who are not worth paying $35 per month; and people who want a new email experience and value the new interface (then they should go to Superhuman or HEY). Alternatives: If you want a new client experience, choose Superhuman or HEY; if you want a chat-based email, choose Spike; if you want a team collaborative inbox, choose Missive; or simply wait for Gmail/Outlook’s native Gemini/Copilot to become sufficient.
Supafax bet on an underrated judgment - most people don't want a better mailbox, they just want their existing mailbox to work for itself. It lives deeply, has less interruptions, and has zero cost to get started. It is the most pragmatic form of this type of product; the real test is whether it can maintain the experience difference when Gmail and Outlook weld free AI assistants into the native interface.

User Reviews

Jonathan_MurrayJr

—

"There are no new applications to learn" is indeed underestimated. Less migration is the real efficiency.

Michelle.Rodriguez60

—

I like this idea, it saves me having to open another client.

Joseph_Allen_2022

—

35 dollars a month is still a bit painful for light users.

LawrencePhillips_7

—

After trying it for three days, the Paihui piece is really fragrant. It used to take four or five emails to make an appointment with a client, but now it finds time to send invitations on its own, and I only need to click confirm. However, it was obviously not like me in the first two days of drafting the manuscript, and I had to manually revise it several times to get it right.

Nicole468

—

I’m curious about how it compares to Superhuman and Fyxer. After all, the previous ones haven’t been completed yet. The author said that living in the original mailbox will not let you learn new things. I agree with this point. Migration is where adoption dies.

RichardBennettK

—

I work in sales, and every day there are mountains of emails from customers, candidates, and partners in my inbox. After Supafax learned my common follow-up techniques, I basically no longer have to write basic replies myself, and important accounts will be automatically pinned to the top. The only dissatisfaction is that it currently only supports Gmail and Outlook web version. I can't count on processing it on my mobile phone. I hope that the mobile version will be released soon.

Kathlee_n652

—

There is no going back.

Pamela.Morales520427

—

I have to say a few words about privacy. It needs to read your historical emails to learn the tone, and the official said it does not store it. There is actually a tension between these two statements. If an enterprise customer really wants to join, I suggest asking the enterprise's security terms and retention policy first. Don't wait until something goes wrong to remember that the data is outside. What you get behind the free trial is email access, so you have to think clearly.

32vhrkq3as

—

The quality of early drafts was a question mark. When it first connects, it is not familiar with your voice at all. Does it just write it out by force? Or does it have a confidence threshold and is not sure enough, so it just marks it and does not write it for you? The official didn't make this clear, so I was a little worried about sending it to the wrong person.

RavenRocketPerker

—

YC W26 came out, and Garry Tan hunted it himself, so the resources are definitely not bad.

f1x3sxrj

—

It takes a few days for the learning curve to be accurate. If you are impatient, you may give up in the first two days.

DrErnestoMárquez_x

—

Our small team tried it for a week and set up a rule: all emails from investors will be automatically labeled and starred. It confirms very quickly, and then every email is automatically processed, so you can reply to the email at any time if you want to change it. This kind of experience of setting rules in plain language and not having to configure triggers is much more refreshing than writing automated processes. The disadvantage is that the current rule customization is not deep enough, and complex filtering still has to be done manually.

RonaldCarter_66

—

So fragrant.

OwenBrooks

—

The "Ask your inbox anything" function is a bit interesting. It directly asks the inbox what to do next and where a certain file is, which is faster than going through historical emails by yourself. However, I tried it and found that the accuracy is okay, but it is not correct every time. I still need to check key emails myself.

Keith.James_X

—

I think Supafax made the right bet. Most people don't want a smarter mailbox, but rather want their existing mailbox to do its job. It lives deeply, has fewer interruptions, and zero settings. It is the most pragmatic form of this type of product. The real test is whether Gmail and Outlook can maintain their experience after welding free AI assistants into their native interfaces. It's worth using in the short term, but risky in the long term.

vduqop03

—

Someone in the comment area asked whether the tone can be distinguished by contact person. The style of writing to the team is very different from that of writing to investors. This is really critical, most tools will be pressed into one tone and I hope Supafax can handle it.

Theresa_Brooks_2024

—

There is a 14-day free trial, no need to bind a card, take a look first.

Supafax

In-depth Report

User Reviews

Similar Products