River
Y CombinatorBacked by Y Combinator

AI Writing Tools

Each one opens on the writing task in front of you, not on a blank chat box.

30-Day Care Plan With Measurable Goals

Turn a patient assessment into a 30-day care plan with problems, measurable goals, interventions with frequency and what to check at each visit. Start free.

HealthcareOpen tool

Add comments that strengthen your proposal

Paste a freelance proposal and get comments where it is vague, unproven or misses the client's problem. Your text stays yours. Start free.

ProfessionalOpen tool

Add Docstrings Where Reviewers Already Asked

River ranks a codebase by the questions reviewers already asked about it, then drafts the comments there. It also counts the docstrings saying nothing.

Software & TechnicalOpen tool

Add structural comments to manuscripts

AI adds inline structural feedback to manuscripts: pacing notes, transition suggestions, scene development opportunities, and narrative arc guidance.

ProfessionalOpen tool

Adverb and Weak Verb Checker for Fiction

Paste a scene and get comments on adverbs and weak verbs where a stronger verb exists, with options that fit your voice. Your text stays as written. Start free.

CreativeOpen tool

Allergy and Medication Reconciliation Table

Paste allergies, home medications and current orders and get reconciliation tables with every unresolved discrepancy flagged for the prescriber. Start free.

HealthcareOpen tool

Analytics Requirements vs Your Schema

River reads an analytics request against the schema you actually have, then marks each question answerable, answerable from a date, or not answerable at all.

Software & TechnicalOpen tool

Assessment and Plan From Your Notes

Paste your problems, findings and plan fragments and get a numbered assessment and plan by problem, with nothing added to your decisions. Start free.

HealthcareOpen tool

Authentic Voice Checker for Your Essay

Paste your essay and see every line that sounds stiff, generic or unlike you, marked in place with why and how to say it your way. Start free.

AcademicOpen tool

Back Cover Blurb and Amazon Description

Describe your book or paste a synopsis and get a back cover blurb plus an Amazon description in its own tone, with no spoilers or invented praise. Start free.

CreativeOpen tool

Blog Post Image Generator From Your Text

Paste a blog post or newsletter and get images made for the passages that need them, placed in the text with captions and alt text. Start free.

Marketing & GrowthOpen tool

Character Questionnaire From Your Notes

Share what you know about a character and get a 28-question questionnaire answered from your notes, with gaps filled as marked suggestions. Start free.

CreativeOpen tool

Check legal spelling and Latin terms

Paste legal writing and get spelling, Latin phrases and commonly confused legal words checked, with plain English options and italics handled. Start free.

LegalOpen tool

Check spelling and typos in pitch materials

Find and fix spelling errors and typos in startup pitch decks. AI catches mistakes that hurt credibility. Perfect for polishing pitches. Start free.

StartupsOpen tool

Check the attribution in your news draft

Paste a news draft and get every attribution checked: loaded verbs like claimed flagged, unsourced facts marked, and said kept where it belongs. Start free.

JournalismOpen tool

Check the defined terms in a contract

Paste a contract and find undefined, unused, duplicated and inconsistently used defined terms, flagged in place with a fix for each. Start free.

LegalOpen tool

Check voice consistency in ghostwritten manuscripts

AI checks ghostwritten manuscripts for voice consistency. Identifies sections where voice drifts from client patterns. Ensures authentic voice throughout.

ProfessionalOpen tool

Check your manuscript for spelling and typos

Get spelling and typo comments on your story or manuscript, with invented names and dialect left alone and your style untouched. Start free.

CreativeOpen tool

Cliché Finder for Your Essay

Paste your essay and get every cliché marked in place, with a question that helps you say what you actually mean instead. Start free.

AcademicOpen tool

Clinical Trial Manuscript Draft From Results

Paste a protocol summary and results and get an IMRaD manuscript draft checked against CONSORT or STROBE, with missing items listed, not invented. Start free.

HealthcareOpen tool

CME Lecture Script From Your Objectives

Give a topic, audience and objectives and get a timed CME lecture script with spoken text, slide cues, cases and sourced recommendations. Start free.

HealthcareOpen tool

CollegeVine Alternative for College Essays

CollegeVine's Sage and peer review, compared with River. Paste your essay for six scores, your weakest paragraph rewritten in your voice and a new draft.

AcademicOpen tool

Competitor Playbook Built From Their Website

Give it a competitor's website and get a full teardown: what they sell, their pricing, customer complaints, search rankings, and specific ways to beat them.

BusinessOpen tool

Conclusion Paragraph Writer for Essays

Paste your essay or your thesis and main points and get a conclusion paragraph that pulls your argument together in your voice. Start free.

AcademicOpen tool

Create a 30-day content calendar

Plan a month of dated content ideas with titles, angles and formats, built around your posting rhythm and launches. Start free.

Marketing & GrowthOpen tool

Create a value proposition canvas

Describe your customer and your offer and get a filled-in value proposition canvas, with fit notes and the assumptions to test with customers. Start free.

BusinessOpen tool

Create competitive landscape table

Create competitive comparison table from your competitors. AI builds perfect competitive analysis for pitch deck. Perfect for all founders. Start free.

StartupsOpen tool

Create partnership outreach email and one-pager

Describe your business and the partner you want, and get a short outreach email plus a one-page partnership proposal built on mutual value. Start free.

BusinessOpen tool

Creative Writing Feedback in the Margins

Paste a story, chapter or essay and get an editor's margin comments on story, scenes and lines, with what works noted too. No rewrites. Start free.

CreativeOpen tool

Death Pronouncement Note From Your Exam

Turn your exam findings, times and notifications into a death pronouncement note, with missing calls such as the organ procurement referral flagged. Start free.

HealthcareOpen tool

Define Confidential Information for your contract

Draft or tighten the definition of Confidential Information for your NDA or contract, with standard exclusions, fitted to your side. Start free.

LegalOpen tool

Denial and EOB Decoder With Next Steps

Paste an EOB, remittance or denial and get every code explained in plain words, who owes what, and the right next step for each denied line. Start free.

HealthcareOpen tool

Diversity or Perspective Statement Writer

Paste the prompt and your notes and get a focused paragraph on your background and what you will contribute, built from your own experiences. Start free.

AcademicOpen tool

Draft a culture essay from your argument

Give your argument about a book, film, show or album and your notes, and get a drafted critical essay built on your reading. Start free.

JournalismOpen tool

Draft a governing law and venue clause

Draft a governing law and venue clause fitted to your contract: which state's law, which courts, exclusive or not, and jury and arbitration choices. Start free.

LegalOpen tool

Draft a limitation of liability clause

Describe the deal and your side, and get a liability cap, damages exclusion and carve-outs sized to the contract, each choice explained. Start free.

LegalOpen tool

Draft a love scene for your romance

Draft a love scene for your romance novel at the heat level you choose, in your characters' voices, with consent on the page. Start free.

CreativeOpen tool

Draft a non-compete checked against your state

Describe the role and state, and get a restrictive covenant checked against that state's current law, with narrower options where needed. Start free.

LegalOpen tool

Draft a profile from your interview

Paste your interview transcript and notes about one person and get a profile draft built from your reporting, fair to its subject. Start free.

JournalismOpen tool

Draft a reported feature from your notes

Paste interviews, notes and documents for a trend or issue story and get a feature draft built only from your reporting, with gaps marked. Start free.

JournalismOpen tool

Draft a severability clause for your contract

Get a severability clause fitted to your contract, choosing between striking and narrowing a bad term, with the terms too central to sever named. Start free.

LegalOpen tool

Draft a tech review from your testing notes

Paste your hands-on testing notes and get a product review draft with specs checked, disclosures included, and a verdict that follows from your notes. Start free.

JournalismOpen tool

Draft a termination for convenience clause

Describe the contract and your side, and get a termination for convenience clause with notice, payment for work done, refunds and wind-down. Start free.

LegalOpen tool

Draft a warranty disclaimer for your contract

Describe what you sell and get a warranty section: the promises you make, the implied warranties you disclaim, and the remedy if something fails. Start free.

LegalOpen tool

Draft an assignment clause for your contract

Draft an assignment clause fitted to your contract and your side, covering consent, mergers, change of control and what happens to a bad transfer. Start free.

LegalOpen tool

Draft an OpenAPI specification from your endpoints

List your endpoints and get an OpenAPI 3.1 YAML draft with paths, schemas, authentication and error responses, ready to validate. Start free.

TechnicalOpen tool

Draft payment terms that get you paid

Describe how you bill and get a payment terms clause with invoicing, due dates, late fees, disputes and suspension, written so you get paid. Start free.

LegalOpen tool

Draft prior auth letters and LMNs

Paste the clinical notes and the request, and get a letter of medical necessity, portal answers or a submission checklist built from the chart. Start free.

HealthcareOpen tool

All tools by category

Business & Revenue Ops