River
Y CombinatorBacked by Y Combinator

AI Tools for Work

Each one starts from the document a specific job produces, not from a blank page.

Marketing & Growth

About Us Page Generator From Your Facts

An About Us page built only from your facts: what you do in the first lines, then your story, your people and your proof.

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Sales & Partnerships

Account Research Brief for a First Meeting

A brief on the company you're meeting: what changed this year, three openers with their sources, and a sheet of who you may meet.

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Consulting & Advisory

Action Title Generator for Consulting Slides

Your slide titles rewritten as action titles: each slide's conclusion in one sentence, why the old title fell short, and the evidence to prove it.

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Writing & Media

AI Beta Reader: See Where Readers Stop

Paste a chapter and get a beta reader's report: where they were hooked, where they got lost or skimmed, and the exact line where they'd stop.

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Writing & Media

AI Book Editor for Developmental Notes

Paste a chapter and get an editor's letter on your stakes, where the chapter turns and what to cut, quoting your lines without rewriting them.

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Writing & Media

AI Book Writer for Fiction or Nonfiction

Start from one sentence or your notes, and get an outline fitted to your novel, memoir or how-to book, plus chapter one.

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Writing & Media

AI Chapter Writer: Turn Beats Into Scenes

Paste the beats for a chapter or scene, and River writes it in your voice, then shows the line where each beat lands.

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Academic

AI College Essay Writer for the Common App

A complete first draft of your college essay for the Common App, under 650 words, built from your own stories and phrases.

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Writing & Media

AI Dialogue Generator for Fiction Writers

Say who's talking and what's at stake, or paste your flat lines, and River writes the dialogue with a distinct voice for each character.

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Writing & Media

AI Fanfiction Generator for One-Shots

Name your fandom and ship to get a complete fanfiction one-shot with a real ending and an AO3-style header: rating, warnings, tags and summary.

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Writing & Media

AI Novel Writer: Plan and Write Chapter One

From one sentence or your outline, River plans every chapter of your novel, writes chapter one in full, and drafts the next whenever you ask.

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Writing & Media

AI Query Letter Generator for Your Book

Paste your pitch or drop in your manuscript to get a one-page query letter in your voice, with the hook, stakes, book details and bio.

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Consulting & Advisory

AI Readiness Assessment From Your Notes

Your client's AI readiness, scored in six areas with a quote behind each score, plus use cases ranked by value and effort and a 90-day plan.

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Marketing & Growth

AI Search Visibility Report for Your Brand

A report on how often AI assistants name you when buyers ask about your category, which sites they cite, and how to get onto each.

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Writing & Media

AI Story Continuer: Continue My Story

Paste where you stopped, and River continues your story in your voice: about 500 more words, the rest of the scene or the next chapter.

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Writing & Media

AI Story Generator for Short Stories

A complete short story from your idea, notes or one tapped genre, with an ending planned before the first line, in a doc you keep.

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Writing & Media

AI Synopsis Generator for Your Novel

Drop your finished manuscript and get a one-page novel synopsis for agents, in present tense, with every twist and the ending told.

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Founders & Small Business

Amazon Listing Optimization Priority List

Your Amazon listings ranked by the profit a fix could recover, with where each one loses the sale and the edits to make first.

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Marketing & Growth

AP-Style Press Release From Your Facts

An AP-style press release written from your facts, with your quotes kept word for word, a fact list to confirm and a pitch email.

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Sales & Partnerships

B2B SaaS Quote and Order Form

A quote and order form for one deal, with every line checked against your proposal, price book and calls, and every promise written in.

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Finance & Accounting

Bank Statement PDF to Excel Converter

An Excel-ready spreadsheet from your bank statement PDFs, scans included: one row per transaction, checked against each statement's balances, with any unreadable line listed.

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Writing & Media

Book Blurb and Amazon Description Generator

Paste your synopsis or drop your manuscript. Get a back cover blurb, an Amazon description ready for KDP, a one-line pitch and an ad hook.

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Writing & Media

Book Outline Generator, Chapter by Chapter

Get a chapter-by-chapter outline of your novel, memoir or nonfiction book, built from one line or your notes, with a clear job for every chapter.

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Writing & Media

Book Title Generator: 20 Ideas for Your Book

Get 20 book title ideas built from your story, each with its reason, plus a top three and the checks to run before you choose.

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Academic

Brown Supplemental Essays for 2026–27

Every Brown 2026–27 supplemental essay prompt, word for word, plus all four essays drafted inside their ranges from your own notes.

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Business & Revenue Ops

Build vs Buy Analysis Template

A three-year cost comparison of building and buying: the vendor's price increases, your build's overruns and upkeep, and where the answer flips.

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Founders & Small Business

Business Plan Writer From Your Notes

A complete business plan for a bank, investors or yourself, with projections, break-even and a downside case built from your own numbers.

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Investors

Cap Table and Exit Waterfall Analysis

Every shareholder's payout at each sale price, worked out from your cap table and charter, plus your share of each extra dollar.

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Consulting & Advisory

Capability Statement Generator From Your Bio

A one-page capability statement built from your bio, resume or old deck, with a version for each buyer and nothing invented.

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Non-Profit

Case for Support Writer for Nonprofits

A complete case for support built only from your facts: the need, your plan, why now and what gifts make possible, plus a one-page summary.

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Marketing & Growth

Case Study From a Customer Interview

A case study written from your customer interview, with quotes kept as spoken and every claim listed for the customer's reviewer to approve.

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Consulting & Advisory

Case Study Generator From Your Final Report

An anonymized client case study from your final report or deck, with every result sourced, plus a testimonial draft, LinkedIn post and proposal credential.

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Legal

Cease and Desist Letter Generator

A firm, specific letter telling someone to stop: the right you hold, the proof behind it, what they must do and by when.

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Writing & Media

Character Name Generator for Writers

Twenty names that fit your character's era, place and role, grouped by feel, with a reason for each and your best three marked.

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Consulting & Advisory

ChatGPT Alternative for Consultants' Work

A client brief from your files or a pasted ChatGPT chat: what each file says, where every figure comes from, and what to ask next.

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Academic

ChatGPT for College Essays, Compared

What ChatGPT and Claude can do for a college essay, where the rules draw the line, and a full Common App draft from your story.

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Writing & Media

Children's Picture Book Manuscript Writer

A read-aloud picture book manuscript from your story idea, usually under 600 words, plus a spread-by-spread plan for every page turn.

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Academic

College Essay Grader With Notes and Fixes

Paste your college essay and get a score on six things admissions readers notice, a note on every paragraph and the three fixes worth making first.

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Academic

College Essay Humanizer in Your Own Voice

Your college essay rewritten in your voice, learned from your own writing, with every fact kept and the key changes listed before and after.

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Academic

College Essay Shortener for Any Word Limit

Your college essay shortened to any word limit from 650 to 50, in your own words, with your story kept and the biggest cuts listed.

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Academic

College Interview Questions and Practice

The 15 college interview questions you're likely to get, with answer notes from your own stories, questions to ask and a practice interview.

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Academic

Columbia Supplemental Essays for 2026–27

Paste your notes or reading list and get Columbia's six supplemental essays drafted: the 100-word list and five 150-word answers.

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Founders & Small Business

Commercial Lease Review and Cost Calculator

Paste your lease and see what it costs each year of the term, what the landlord can raise later, and which changes save the most.

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Academic

Common App Activities List Writer

Paste your notes or résumé and get your Common App activities list ranked and written to fit the 50, 100 and 150 character boxes.

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Academic

Common App Checklist Before You Submit

A checklist of the real problems in your Common App and supplements, from another college's name to a typo, each quoted with its fix.

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Investors

Comparable Company and Multiple Analysis

A comps table from your whole screen: every multiple on one definition, the range with and without your exclusions, and which ones a filing can settle.

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Marketing & Growth

Competitive Positioning Map From Public Data

A map of you and your competitors on the two axes that best separate the field, with every score traced to a public source.

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Founders & Small Business

Competitor Analysis for Small Businesses

Name your local competitors and get their customers' complaints counted, the weaknesses they can't easily fix, and a position you can defend.

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All tools by category

Writing & Media

Academic