Martin vs Noah AI vs The Librarian

The same 33-row checklist and the same rules. Every cell shows vetted official evidence or “Not checked.”

Visit Martin Visit Noah AI Visit The Librarian Martin alternatives Noah AI alternatives The Librarian alternatives

So which one?

Notis aside, The Librarian has the highest checked-evidence score: 47% across 33 vetted rows (all 33). Martin: 41% across 33 vetted rows (all 33) and Noah AI: 34% across 32 vetted rows; 1 row is not checked yet.

They are not really after the same job, though: The Librarian for remembering context between conversations, Martin for scheduled and event-triggered work and Noah AI for reaching it from the apps you already message in.

Cheapest way in is a tie: Notis and The Librarian all start at $0, and only The Librarian has a free plan that does the product's main job.

Nothing here publishes anything on Bring your own API key, Open source and Run it on your own server.

Only Notis publishes anything on Telegram, Runs on your own Claude plan, Runs on your own ChatGPT plan and 6 more rows.

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The whole grid, row by row

Scroll sideways to compare every product. Feature names stay pinned.

Capability comparison between Notis and the selected assistants
Capability	View pricing	MartinVisit site	Noah AIVisit site	The LibrarianVisit site
Where you can use it
WhatsApp				WhatsApp; QR + OTP sign-in
iMessage		—Not offered		—Absent from every current channel list
Telegram		—Not offered	—Not in FAQ or terms channel lists	—Still roadmap-only
Slack		Vendor Slack app, DM or @mention
Email		Email him and he replies	CC or write to Noah's own address	Partial
SMS or a phone number	PartialInbound calls only, no SMS	Reachable via SMS or phone call		SMS/Text channel; no public number
Voice messages	Voice notes + live calls
Web or desktop app	Web and desktop app	Web app only, no downloadable client	Partial	Web app only, no desktop client
Its own iPhone or Android app	—	iOS only	—"No app to download"; no store listing
Bring your own AI
Runs on your own Claude plan		—Not offered	—No sign-in with a Claude plan	—No Claude sign-in path
Runs on your own ChatGPT plan		—	—No sign-in with a ChatGPT plan	—No ChatGPT sign-in path
Bring your own API key	—	—Not offered	—Flat $49/month, model usage included	—No API-key field anywhere
Works inside your own coding agent		—No MCP server, SDK, or public API	—No MCP server or developer docs	—
You choose which model runs your work		—	—One undisclosed third-party LLM stack	—One fixed, unnamed model
What it can do
Ready-made app integrations	1,000+ apps	Partial3 pages, ~6 named apps	Partial9 named in FAQ; full list login-gated	Partial
Creates and edits documents		Partial	—Docs/Drive are referenced, not authored	—
Save your own reusable instructions			—No saved instruction sets documented	Partial
Browses the web for you		—Search only, no page interaction	—No web browsing; errands go by phone	—Retrieval only, no live web page actions
Posts to social media for you		—Not offered	—
Joins and records your meetings	—	—Not offered	Not checked	—
Memory
Remembers you between conversations		Pro only: "Enhanced long term memory"		Memories from Basic tier up
Reads your existing files and apps	Notion, Gmail, Drive, Granola, web
Runs without you
Runs on a schedule or a trigger		Pro-only Background Tasks	Partial
Reminds and nudges you				5/20/50 reminders per day by tier
Computers it can use
Gives it a cloud computer of its own	1h/mo (Pro) to uncapped (Ultra)	—Not offered	—	—
Controls your own computer	Shell and apps, via the desktop app	—Not offered	—Nothing runs on your machine	—No local/desktop agent published
Connects to MCP servers on your computer		—Not offered	—No local agent; MCP not mentioned	—Closed vendor-run OAuth connectors only
Trust & control
Open source	—	—Closed SaaS	—Closed; proprietary IP clause	—
Run it on your own server	—	—Hosted subscriptions only	—Hosted only via heynoah.io	—
Says it will not train on your data	Covers Notis and its LLM providers	Partial	—Not stated (checked 2026-09-02)
Published security certification	PartialSub-processors certified; Notis is not	—	—	Partial
Plans & support
Free plan does the product's main job	Partial	—Trial only, no ongoing free plan	—Paid only: $49/month, invitation-gated
Shared team workspace		—Single-person subscriptions only	Partial	Partial
Price	FREEPRO$13/moyr (rate on a yearly commitment)+2 more	Basic$21/moyr (rate on a yearly commitment)Pro$30/moyr (rate on a yearly commitment)	Early adopter$49/mo	FreeBasic$9.99/mo+2 more

IncludedPartial— Not documentedNot checked

The catch with each one

Numbered by support score across vetted capability rows, with incomplete evidence shown on every card. Unknown rows never count as a no, and this is not a score against your answers.

1. Notis

Personal AI assistant

Notis is a personal AI assistant you message from WhatsApp, iMessage, Telegram, Slack or email, and reach from your own coding agent through its MCP server.

Best for: running long jobs on a machine of its own

Documented strengths

Where you can use it: WhatsApp, iMessage, Telegram, Slack, Email, Voice messages and Web or desktop app
What it can do: Ready-made app integrations, Creates and edits documents, Save your own reusable instructions, Browses the web for you and Posts to social media for you
Bring your own AI: Runs on your own Claude plan, Runs on your own ChatGPT plan, Works inside your own coding agent and You choose which model runs your work

The catch

Official evidence records a gap in published guarantees about your data: no published support for Open source and Run it on your own server.

Pricing

FREEPRO$13/moyrPRO+$39/moyrULTRA$99/moyr

Free–$149/mo · help.notis.ai

Who should pick it

Pick Notis if running long jobs on a machine of its own is what decides it for you. Walk away if you need open source, self-hosting or a named certification.

See what those rows cost80% across 33 vetted rows (all 33)

2. The Librarian

AI executive assistant for real estate agents

A voice-first WhatsApp and SMS AI assistant for real estate agents that captures leads by voice, matches properties, drafts follow-ups, and runs their calendar and CRM tasks from the field.

Best for: remembering context between conversations

Documented strengths

Where you can use it: WhatsApp, Slack, SMS or a phone number, Voice messages, Web or desktop app and Its own iPhone or Android app
Memory: Remembers you between conversations and Reads your existing files and apps
Runs without you: Runs on a schedule or a trigger and Reminds and nudges you

The catch

The checked gap is messaging channels. Nothing published on iMessage and Telegram.

Pricing

FreeBasic$9.99/moPro$19.99/moCustomCustom pricing

Free–$19.99/mo (Custom tier: contact for pricing) · thelibrarian.io

Who should pick it

The Librarian is the one to take when remembering context between conversations is the deciding factor. Walk away if you need it in the other apps you message from.

Our take on how it differs from Notis: The Librarian is a real-estate lead-capture and follow-up assistant reachable by WhatsApp, SMS, Slack and its own apps, with no iMessage, Telegram, or choice of AI model; Notis is a channel-first personal AI assistant on WhatsApp, iMessage, Telegram, Slack, email and voice with an execution layer across model providers.

Visit The Librarian47% across 33 vetted rows (all 33)

3. Martin

AI personal assistant reachable by phone, SMS, WhatsApp, email and Slack

A personal assistant you reach by phone call, text, WhatsApp, email or Slack that runs your calendar, inbox, reminders and notes.

Best for: scheduled and event-triggered work

Documented strengths

Where you can use it: WhatsApp, Slack, Email, SMS or a phone number, Voice messages, Web or desktop app and Its own iPhone or Android app
Memory: Remembers you between conversations and Reads your existing files and apps
Runs without you: Runs on a schedule or a trigger and Reminds and nudges you

The catch

No team and plan options, at all. We found nothing published on Free plan does the product's main job and Shared team workspace.

Pricing

Basic$21/moyrPro$30/moyr

Basic $35/mo, $21/mo billed yearly; Pro $49/mo, $30/mo billed yearly; 7 days free · no free tier · trymartin.com

Who should pick it

Worth it for scheduled and event-triggered work — that is what Martin is built around. Walk away if you need a usable free plan or team seats.

Our take on how it differs from Notis: Martin covers phone, SMS, WhatsApp, email and Slack with live voice calls and outbound calling on your behalf, but not iMessage or Telegram, and bundles one AI model per plan tier with no MCP, API-key or model-choice option, unlike Notis's channel-first, provider-agnostic execution layer.

Visit Martin41% across 33 vetted rows (all 33)

4. Noah AI

AI executive assistant (scheduling and follow-ups)

An AI executive assistant you text over SMS, WhatsApp, iMessage, Slack or email to schedule meetings, send emails, set reminders and make phone calls for you.

Best for: reaching it from the apps you already message in

Documented strengths

Where you can use it: WhatsApp, iMessage, Slack, Email, SMS or a phone number and Voice messages
Memory: Remembers you between conversations and Reads your existing files and apps
Runs without you: Reminds and nudges you

The catch

There is no published guarantees about your data here at all — nothing published on Open source, Run it on your own server, Says it will not train on your data and Published security certification.

Pricing

Early adopter$49/mo

$49/month · no free tier · heynoah.io

Who should pick it

Pick Noah AI if reaching it from the apps you already message in is what decides it for you. Walk away if you need open source, self-hosting or a named certification.

Our take on how it differs from Notis: Noah is a narrow executive-admin assistant (calendar, email threads you CC it on, reminders, phone calls) on one undisclosed model stack; Notis adds Telegram and a voice channel, lets you choose the model and bring your own subscription or key, and runs a far broader tool and automation layer.

Visit Noah AI34% across 32 vetted rows; 1 row is not checked yet

Where none of them wins

Nothing on this page publishes anything on Bring your own API key, Open source and Run it on your own server. If one of them is the thing you actually need, none of these is your answer.

One more thing, because a table like this can be read for more than it is worth. It counts what each product documents. It says nothing about how reliable any of them is, how fast it replies, how good its writing is, or what it does when an integration breaks on a Friday night. A lower support score can still be the better daily driver. The only way to know is to put a real week of work through both.

A dash means the capability was not documented on the official pages we checked. Not checked means the evidence is still incomplete.

Questions people ask

Which of The Librarian, Martin or Noah AI scores highest in the evidence checked so far?

The Librarian, with 47% across 33 vetted rows (all 33). Martin: 41% across 33 vetted rows (all 33) and Noah AI: 34% across 32 vetted rows; 1 row is not checked yet. Unknown rows stay out of the score, so treat this as an evidence status, not a complete market verdict.

How much do they cost?

The Librarian: Free–$19.99/mo (Custom tier: contact for pricing); Martin: Basic $35/mo, $21/mo billed yearly; Pro $49/mo, $30/mo billed yearly; 7 days free; Noah AI: $49/month. Notis and The Librarian all start at $0, and only The Librarian has a free plan that does the product's main job.

Which of them can I try for free?

The Librarian has a free tier and Martin and Noah AI do not.

Which of them work in Its own iPhone or Android app?

The Librarian and Martin do. Noah AI does not.

What can none of them do?

Not one of them publishes anything on Bring your own API key, Open source and Run it on your own server. A dash means the capability was not documented on the official pages we checked. Not checked means the evidence is still incomplete.

How was this comparison put together?

We read whatever each product publishes — 107 first-party sources across 4 products — and scored all of them on the same 33 rows. Last checked 21 August 2026. A dash means the capability was not documented on the official pages we checked. Not checked means the evidence is still incomplete.

Where does Notis fit in?

At number 1, scored by the same code on the same 33 rows as everything else. Against The Librarian specifically: The Librarian is a real-estate lead-capture and follow-up assistant reachable by WhatsApp, SMS, Slack and its own apps, with no iMessage, Telegram, or choice of AI model; Notis is a channel-first personal AI assistant on WhatsApp, iMessage, Telegram, Slack, email and voice with an execution layer across model providers.

How we checked all this

We read every product on this page against whatever it publishes — docs and pricing pages where there are any, the homepage where that is all there is — against the same 33 buyer-focused rows. A support score uses only rows with an explicit vetted state; every unchecked row remains visible and never becomes a no. Notis chose the questions and is scored by the same rule. Count the links below before you weigh a result; some vendors give us three pages and some give us one. Last checked 21 August 2026. No vendor briefings, no affiliate links, no press releases.

Sources

Spotted something out of date? These things move weekly and we would rather be corrected. Tell us at flo@mindtheflo.com and the row gets rechecked.

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