Applied AI software

We build software that puts AI to work, with people in control.

Portman LLC builds and operates a portfolio of AI products. Our flagship, PortMem, verifies AI-written documents against their sources before anyone signs off.

Founded: 2026
Products: 10 in operation
Flagship: PortMem

Flagship

PortMem

AI writes faster than you can check.

PortMem checks AI-written documents against the sources they rely on and flags every claim a source doesn't support. Each document then moves to the next approver, and every decision is signed and kept.

01Verified against sourcesEach claim is traced to the documents it depends on, so reviewers see what is supported and what isn't.
02Built for sign-offReviews move from approver to approver, with a signed record of every decision.
03Where work happensA web console, an API, and connectors for Claude, ChatGPT, Google Chat, Microsoft Teams and Chrome.

Visit portmem.com

Portfolio

Products we build and operate

Each product is focused on one job and run by Portman LLC.

Applied AI
Product	Sector	What it does
PortMem	Enterprise	Verifies AI-written documents against their sources and routes them for signed approval.	portmem.com
AIccentCoach	Education	AI pronunciation coaching for American English, on the web, iPhone and Android.	aiccentcoach.com
WindCone	Media	Collects videos, finds what connects them, and turns the research into original scripts.	windcone.app
AdgencIA	Marketing	Generates branded social content and publishes it to Instagram, YouTube and TikTok, with performance in one place.	adgencia.app
WallStreet Agents	Finance	Ten specialized AI agents analyze a stock in parallel across fundamentals, technicals, sentiment, macro and risk.	wallstreetagents.app
AppTube	Discovery	A discovery platform for AI-built apps: search, compare and find the right tool.	apptube.app

Tools
Product	Sector	What it does
CDIStock	Finance	Tracks US and Brazilian stocks in reais and compares a portfolio with the CDI. In Portuguese.	cdistock.com
AluguelManager	Real estate	Rental contracts, payments and rent adjustments for landlords in Brazil. In Portuguese.	aluguelmanager.com
RentBuy	Real estate	A rent-versus-buy calculator with a 30-year analysis, taxes and Monte Carlo simulations.	rentbuy.org
AudioWeb	Music	Splits songs into stems privately in the browser, with loops, speed and pitch for practice.	audioweb.app

We build software that puts AI to work, with people in control.

PortMem

Products we build and operate

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