The best AI for speech writing: 8 tools tested, and what to avoid
Wedding toasts, eulogies, keynotes and class presentations: the eight AI tools we would use to draft, tighten and rehearse a speech, each tested and scored, plus the mistakes that make an AI speech sound like one.
A speech is not an essay read aloud. It is written for the ear, for one room, and usually for one occasion you will not get to repeat. AI is very good at the parts of that job most people dread: finding a structure, producing a first draft, cutting it to length. It is bad at the part that matters most, which is the true, specific detail only you know.
So the best AI for speech writing is really a small kit: one tool to draft, one to tighten, one to hear it, one to rehearse. These are the eight we would use, each test-driven and scored out of 100 on the same rubric, followed by what to avoid.
Drafting the speech
Give the AI your real stories and ask it for a shape. Do not ask it for the stories.
Claude: 88/100
Claude is the best writer of the general assistants, with a natural, unforced tone that suits a speech better than the polished corporate voice most AI defaults to. Give it the occasion, the audience, the length and three true details, and ask it to write for speaking aloud. It handles long drafts and careful revisions well. The free tier has tight usage caps, so do your thinking before you start prompting.
ChatGPT: 93/100
ChatGPT is the strongest all-rounder and the better brainstorming partner: ask it for five different openings, three ways to structure a eulogy, or what a skeptical audience would push back on in your keynote. It is quick to iterate with. Left alone it drifts toward generic sentiment, so keep feeding it specifics. The free tier has usage caps at busy times.
Read the full ChatGPT review →
Google Gemini: 88/100
If you write in Google Docs, Gemini drafts and rewrites inside the document you already have open, which keeps your notes, draft and edits in one place. The free tier is generous. As with any of these, plan on a rewrite pass in your own voice.
Read the full Google Gemini review →
Tightening it to time
Most speeches are too long. People speak at about 130 to 150 words a minute, so a five-minute speech is roughly 650 to 750 words. Count yours before you fall in love with it.
Wordtune: 82/100
Wordtune rewrites a sentence several ways while keeping its tone and meaning, which is exactly what you need when a line is true but clumsy, or a paragraph has to lose twenty words. It works in the browser, Gmail and Docs. The free tier limits rewrites per day, and it only writes in English.
Read the full Wordtune review →
Grammarly: 86/100
Grammarly catches the errors and the unclear sentences, and its tone detector tells you when a passage reads colder or more formal than you meant. Ignore its instinct to make everything tidy and written: fragments and repetition are fine in a speech. The free tier covers the proofreading.
Read the full Grammarly review →
Hearing it before the room does
A sentence that reads well can be impossible to say. Listen to the draft before you learn it.
ElevenLabs: 91/100
Paste your draft into ElevenLabs and listen to it in a natural, expressive voice. The lines that are too long to say in one breath, and the words that repeat too close together, become obvious in a way they never are on the page. It is the most realistic AI voice we have tested, and the free plan is enough for a couple of run-throughs of a short speech. Speechify (85/100) does the same job and reads straight from a document or web page.
Read the full ElevenLabs review →
Rehearsing
The draft is not the speech. The speech is what comes out of your mouth.
Otter.ai: 85/100
Record a full run-through with Otter and read the transcript afterwards. It shows you what you actually said, where you drifted from the script, how often you said "um" and "so", and how long it really took. Then fix the script to match how you speak, not the other way round. The free tier is capped, which is fine for a handful of rehearsals.
Read the full Otter.ai review →
Slides, if the speech has them
A toast needs none. A keynote usually does.
Gamma: 85/100
Give Gamma your outline and it builds a clean deck in minutes, which you can then strip back. For a speech, fewer and simpler slides are better: use it to get a consistent look quickly, then delete half of what it made. Free credits run out after a few decks.
A prompt that works
Tell the AI six things: the occasion, who is in the room, the length in minutes, the tone, three true and specific details or stories, and what you want people to feel at the end. Then ask for a draft written for speaking aloud, with short sentences, at the word count for your time. Ask for three different openings and pick one. Then rewrite the whole thing in your own words: the draft gives you the shape, and the rewrite makes it yours.
What to avoid
- Invented stories, quotes or statistics. AI will happily make up a touching anecdote or a famous quotation. In a eulogy or a wedding toast, a made-up memory is the worst possible mistake. Supply every fact yourself and check every quote.
- The generic opening. "Today we gather" and "the dictionary defines" are what an AI writes when you give it nothing. Start with a specific moment instead.
- Borrowed jokes. AI humor is safe and flat. The line that lands is the one only this room understands.
- Reading it word for word. Learn the structure and the first and last lines, and speak the rest. An audience forgives a stumble long before it forgives a recital.
- AI "humanizer" tools. You do not need one: a speech is heard, not scanned. The ones we have reviewed are among the lowest-scoring writing tools in our directory.
- Skipping the rules for graded work. If the speech is for a class, check whether AI drafting is allowed before you use it.
For every writing tool we have reviewed, ranked, see the best AI writing tools.
Frequently asked questions
What is the best AI for writing a speech? Claude for the writing itself, because its tone is the most natural, and ChatGPT for brainstorming structures and openings. Use both free plans and keep the draft you prefer.
Can AI write a wedding speech or a eulogy? It can give you a structure and a first draft in minutes. The stories, names and details must come from you, and the final wording should be yours. A speech that could be about anyone moves no one.
How long should a speech be? Shorter than you think. At 130 to 150 words a minute, a three-minute toast is about 400 to 450 words and a five-minute speech about 650 to 750.
