Superhuman open source alternatives

I’m checking the candidate set against the actual Superhuman problem first. The source data is messy here, so I’m going to keep the article honest and call out where the “alternatives” are really just adjacent open-source tools rather than true email-client replacements.## The one thesis that will save you a week

There is no clean open-source Superhuman clone in this candidate set, so the real question is not “what is the best replacement?” It is whether you are trying to replace the inbox layer itself, or just the expensive, closed, Gmail/Outlook-flavored machinery wrapped around it. If you only need speed, you are shopping for ergonomics. If you need control, self-hosting, or auditability, you are really shopping for ownership, and Superhuman was never built to give you that.

Why people are leaving Superhuman in 2026

The entry paid tier starts at $30 per month, which is a lot to spend on a client that still sits on top of Gmail or Outlook. That is the first complaint, and it is also the cleanest one: you are paying premium money for a polished layer, not for mail infrastructure. If the inbox still lives elsewhere, the lock-in and policy headaches still live elsewhere too.

The closed-source part matters more than people admit. Once you notice you cannot self-host it, inspect it, or make it your own, the product starts to look less like “power user software” and more like a very nice rental. That is fine if you want a rental. It is less fine if your organization wants to own its systems or keep sensitive workflows out of somebody else’s black box.

The invite-only history is mostly theater at this point, but it points at the same thing: Superhuman is a premium service, not a composable stack. That works until your team decides it wants the opposite of premium theater and starts asking boring questions about portability, sovereignty, and vendor risk. Boring questions usually win.

The alternatives that matter

None of the projects below is a true mail-client replacement. They are the nearest open-source things in the dataset, sorted by GitHub stars, and most of them replace pieces of the Superhuman story rather than the app itself.

n8n

n8n is the obvious pick if what you really want is to stop doing repetitive email-adjacent work by hand. It is a workflow automation platform with native AI capabilities, so it lives around the inbox rather than inside it. If your Superhuman habit is mostly triage, routing, follow-up nudges, or “when this lands, do that,” n8n is the sort of tool that can absorb that logic without another SaaS subscription.

Live metrics: 203455 stars, 1165 open issues, NOASSERTION license, last push 2026-09-05.

Pick n8n if email is just the trigger and the value is in the automation chain. Skip it if you want a polished keyboard-first inbox, because n8n will happily move work around but it will not make reading mail feel fast.

Ollama

Ollama is for people who want local models without turning their laptop into a shrine to Docker docs. It is not an email client, and it should not be pretending to be one, but it does cover the part of Superhuman that keeps getting inflated with AI marketing gloss. If your real gripe is paying for smart features you do not control, Ollama is the more serious answer.

Live metrics: 180232 stars, 3905 open issues, MIT license, last push 2026-09-05.

Pick Ollama if you want local LLMs for drafting, summarizing, classification, or any mail-adjacent experiment that should stay off a third-party cloud. Skip it if you want a complete inbox workflow, because Ollama gives you the model runtime, not the product.

Open WebUI

Open WebUI sits on top of local or API-backed models and gives you a clean place to use them. That makes it a plausible replacement for the AI layer people pay for in products like Superhuman, but it does not touch the actual email problem. It is useful, well-liked, and completely beside the point if what you want is a better way to process mail.

Live metrics: 151039 stars, 285 open issues, NOASSERTION license, last push 2026-09-05.

Pick Open WebUI if you want a self-hosted chat interface for models and you care about owning the front end. Skip it if your definition of “alternative to Superhuman” means keyboard shortcuts inside Gmail or Outlook.

Excalidraw

Excalidraw is the odd one here, which is exactly why it belongs in the discussion. It is a sketching tool, not a mail client, but a lot of inbox pain is really coordination pain wearing an email costume. If Superhuman is where you collect all the loose ends, Excalidraw is where you can stop pretending those loose ends are a text thread and draw the actual system instead.

Live metrics: 131200 stars, 3443 open issues, MIT license, last push 2026-09-04.

Pick Excalidraw if your email bottleneck is really about planning, debugging a process, or getting a messy decision out of your head and onto a shared surface. Skip it if you are looking for reminders, snippets, or AI compose, because this is a whiteboard, not a premium inbox.

Supabase

Supabase is far from an inbox replacement, but it matters if the real goal is to own the systems around email instead of renting them. It gives you a Postgres-backed development platform, which is useful when you are building the internal tools, workflows, or customer-facing products that reduce email dependence in the first place. That is not a substitute for Superhuman, but it is the sort of infrastructure move that shows up when teams get tired of buying little SaaS fragments for every job.

Live metrics: 108876 stars, 1101 open issues, Apache-2.0 license, last push 2026-09-05.

Pick Supabase if you are building the app or workflow that should have replaced the manual email process months ago. Skip it if you wanted a ready-made mail client, because Supabase will let you build one and then make you earn every screen.

LobeChat

LobeChat is another AI-first interface, this time with more product polish and less infrastructure talk. It is still not an email client, but if the part of Superhuman you actually like is the glossy AI layer, this is at least operating in the same neighborhood. It gives you a modern chat surface for models, which is useful, but also a pretty good reminder that “AI productivity” and “email productivity” are not the same thing.

Live metrics: 82247 stars, 885 open issues, NOASSERTION license, last push 2026-09-05.

Pick LobeChat if you want a self-hosted AI front end and are assembling a local productivity stack. Skip it if your problem is triaging an inbox, because this is conversation with models, not conversation with people who owe you a reply.

Decision framework

• If you want mail automation, pick n8n.
• If you want local AI for drafts and summaries, pick Ollama.
• If you want a self-hosted AI chat UI, pick Open WebUI.
• If your email problem is really coordination, pick Excalidraw.
• If you are building the systems around email, pick Supabase.
• If you need a real Superhuman replacement, keep looking; none of these is a clean one.

What to watch for

The migration friction here is not data transfer, because Superhuman lives on top of Gmail or Outlook and the mailbox usually stays put. The real cost is behavioral: shortcuts, reminders, snippets, triage habits, and whatever AI conveniences people got used to. Replace the wrong layer and you just move the pain around.

There is also a basic category mismatch. These projects are good open-source tools, but most of them solve adjacent problems, not inbox management. If you try to substitute a mail client with an automation engine or a model UI, you will get a more complicated stack and probably a worse morning.