Watch a diagram build itself from a spoken process
Wavelength is a voice-to-diagram tool. You talk through a process, and it draws the flow while you are still talking. The live demo runs on your own words rather than a canned example: hold the mic and describe something, or type a few sentences, and watch what comes back. No account, nothing saved.
The demo needs no account. The free plan needs no card.
What happens when you open it
The demo is two panels. On the left you describe a process. On the right it gets drawn.
- Talk or type. Hold the mic button inside the text box and speak, then release, and your words appear as text. Or skip the mic and type. Either way it is your process, not a scripted one.
- Hit “Map my sentence.” Wavelength reads what you described and builds the diagram, picking shapes for actors, systems, decisions, and data stores and drawing the connections between them.
- Change it. Drag any node, right-click one to edit it, click a connection to reverse or reshape it. A legend appears under the canvas once there is something to explain.
The demo allows a few maps a day, takes a short description rather than a full transcript, and saves nothing. Your words are never used to train a model.
An example, and what it produces
If you want a sentence to try, this is the kind of thing that works well. It is one continuous piece of discovery-call speech, the kind someone says in the first ten minutes of a technical call, with nothing cleaned up or structured for a diagramming tool.
“So the leads come in through HubSpot, marketing qualifies them, and if they look good they get routed to a sales development rep. If not they drop into a nurture campaign. Meanwhile everything's syncing nightly into Snowflake, where dbt cleans it up before it hits Tableau.”
That one sentence contains four different kinds of thing, and they need different shapes on a diagram. Wavelength separates them as it listens rather than asking you to classify anything.
| Kind of node | From this sentence |
|---|---|
| Systems | HubSpot, Snowflake, dbt, Tableau |
| Actors | Marketing, sales development rep |
| Decisions | Whether a qualified lead “looks good” |
| Outcomes | Routed to an SDR, or dropped into a nurture campaign |
It also catches the part people usually lose on a call: the nightly sync into Snowflake runs alongside the lead flow rather than after it. That is a parallel branch, and it gets drawn as one.
How it marks its own guesses
This is the part worth understanding before you trust any tool like this. Wavelength distinguishes between what it heard and what it inferred:
- Solid arrows are connections stated directly in the speech.
- Dashed amber arrows are inferences, left unconfirmed until you accept or correct them.
An inferred connection never silently becomes fact. If Wavelength assumes an ordering you did not actually state, you can see that it assumed it, which matters when the diagram is about to be sent to a customer as a record of what was agreed.
What you can do in the live demo
Drag any node, right-click one to change it, and click a connection to reverse or reshape it. Dashed amber connections are the inferred ones, and clicking a dashed connection is how you confirm or fix it. Everything is interactive and nothing is saved. Saving a flow and exporting a PNG are the two actions that need an account.
Why this is different from typing a diagram
Text-to-diagram generators and diagram-as-code tools both assume you already know the process well enough to write it down. On a discovery call you do not. You are learning it in real time from someone who has never had to explain it in order before.
The value of building the diagram during the conversation is that the other person can correct it while they are still in the room. A diagram you write up afterwards captures what you think you heard. See voice to diagram for the longer version of that argument, and Wavelength vs Lucidchart for where a traditional diagramming suite is still the better tool.
Common questions
Do I need an account to try the Wavelength demo?
No. The live demo takes your own sentence with no signup at all. You can drag nodes, right-click them, and click connections. Saving a flow and exporting a PNG are the only actions that require an account.
What does the Wavelength demo actually do?
You describe a process in your own words, either by holding the mic button and talking or by typing, and Wavelength maps it as you go. There is no canned example to watch. The diagram is built from your sentence, choosing shapes for actors, systems, decisions, and data stores and drawing the connections between them.
How does Wavelength show what it guessed versus what it heard?
Solid arrows are connections Wavelength heard stated directly. Inferred connections are drawn as dashed amber lines and left unconfirmed, so you can click one to confirm or fix it rather than having a guess silently become part of the diagram.
Can I use a whole call transcript in the demo?
The demo takes a short description, a few sentences rather than a full transcript, and allows a few maps a day. Pasting a complete transcript from Zoom, Gong, or Fireflies works on a free account, which covers 5 saved flows and needs no credit card. See turning a transcript into a flowchart for that workflow.
Does it work on more complicated processes?
Yes, and that is where it earns its keep. Real calls produce branches, nested systems, and multiple owners, which is what the tool is built for, because those are the flows nobody can hold in their head. The demo is capped at a short description so the map comes back quickly, not because longer processes are a problem.
Who is Wavelength for?
Sales engineers mapping a prospect's data flow live on a discovery call, solution architects capturing an architecture review while it happens, and technical project managers and IT transformation consultants documenting a current-state process with the people who actually run it.