The diagram platform that draws with you

Think it.Say it. Sketch it.Shipanything

flowss is Flow Systems Studio: 9 workstations, 110 rendering engines, and a named agent in every studio (the flowss Studio Agent, the flowss Sketch Agent and the rest) that turns a sentence, a sketch, or a photo into a diagram you can edit forever.

Type itSay itSketch itPhotograph it
type or paste — nothing leaves this deviceno account
→
Deterministic routing, local rendering, a readiness check — all of it before you sign up.
Start here — it's freeEnter takes you where the router just pointed

Not a demo reel — the panel above runs the platform’s own router and renderers in your browser, signed out.

110
rendering engines
5,012
curated templates
9
workstations
34k+
icons & figures
Watch it work

Every studio, at work.One after another.

Studio. Write or paste any of the engines' source and watch it render as you type. Click a label in the picture and the source rewrites itself; convert between engines without a model call; export SVG, high-DPI PNG or PDF. All of it on a free account.

Together, live

Four people. One board. The same second.

Named cursors, a label typed while a node moves beside it, a question pinned and answered and resolved, voice, follow mode, and a history you can scrub — then the honest part: what live means in each studio.

What live means, studio by studio
  • WeaveNodes and edges sync · cursors · comments · voice
  • ScienceNodes and edges sync · cursors · comments · voice
  • SketchCursors · comments · voice
  • BPMNOne pen at a time · element comments · voice
  • LabOne pen at a time · comments
  • StudioOne pen at a time · cursors and pins on cloud projects
  • EvidencePresence and voice
  • FigureA personal workspace
  • StudyA personal workspace

Live sessions start on Plus, with up to three seats; Ultra adds unlimited seats and voice.

Checked as you work

It catches what your reviewers would.

Nine studios, nine checks, running as you work. Each one says what is wrong in the words the product uses, and — where a fix is safe — carries the fix. None of them is a model guessing.

Scienceequation · balance
CH₄ + O₂ → CO₂ + H₂O
CH₄ + 2O₂ → CO₂ + 2H₂O
Balanced — atoms and charge are conserved. Exact rationals, one click.
✓ fixeddeterministic
Sciencestatcheck
t(28) = 2.20, p = .02
implies p = .036
Recomputed rounding-aware. Which number is the typo is the author's call.
✓ caughtdeterministic
Labcohort arithmetic
ineligible: 189
ineligible: 198
Compiles — every count derives from its parent, and the CONSORT view draws.
✓ fixeddeterministic
FigureNature · preflight
A B C D · 4.2 pt
a b c d · 5 pt
Two repairs, one click each — the export gate opens.
✓ fixeddeterministic
BPMNsoundness
✕ split → ⊕ join
✕ split → ✕ join
Sound: every case can finish. Decided by state-space search.
✓ fixeddeterministic
Studioresident · layout
flowchart
flowchart TD
Add flow direction — a deterministic fix, one Ctrl-Z away.
✓ fixeddeterministic
Weavediagram checks
3 problems on the canvas
Fix all safe (2)
One undo step. The fix that deletes waits for you to say so.
✓ fixeddeterministic
Evidencegrounding gate
“…improved sleep in every participant”
claim rejected
A claim must quote its source before it reaches the synthesis.
✓ caughtdeterministic
Flowacross documents
5 mg/kg · 5 µg/kg
flagged in both
Flow reads every studio's documents and names the disagreement.
✓ caughtdeterministic
Readiness — one word, read by every surface
empty→draft→sound→reviewed→publishable
One platform

One document. Every studio.

The studios are one platform underneath. Work moves on with ⌘J, lands in the next studio in its native form, is checkpointed in the Vault, and leaves a recorded journey behind it — and ⌘K finds it again from anywhere.

The work, modelled

Seven stages. Seven specialists.

Underneath every studio, the platform models the work itself — and each stage’s specialist is defined by what it refuses to do. Only verification is required; everything else is yours to skip.

  1. Intake

    “What have I got?”

    Sketch interpreter
    reads ink, photos and papers into material
  2. Frame

    “What am I actually making?”

    Framing analyst
    never builds
  3. Build

    “Make the thing.”

    Each studio's specialist
    works in the studio's native form
  4. Verifyrequired

    “Is it sound?”

    Verifier
    adjudicates — never fixes
  5. Critique

    “Is it any good?”

    Critic
    judges — never edits
  6. Refine

    “What would make it better?”

    Refinement pass
    must measure the delta it claims
  7. Publish

    “Can someone else open it?”

    Publication preflight
    the journal's floors, before the journal does
Beyond drawing

A platform, not a picture tool.

AI features run on your hosted point allowance, or — on Starter and up — on your own AI key, unmetered (fair-use ceiling). Everything else renders in your browser, apart from PlantUML and the Kroki engines, which a render service draws.

Questions
Free covers the Studio and the Sketch canvas: every engine on the universal canvas, the ⌘K command palette, share permalinks, click-to-edit, exports, and 3 saved figures in each. The other seven workstations — Study, Evidence, Weave, Lab, Science, Figure, BPMN — start at Starter, along with the templates written for them, Sketch's pro layer (the full wireframe kit, presentation mode, version history), the figure cap coming off, and AI. Bringing your own API key is a Starter feature too; hosted AI points come with Plus.
Free to start · no credit card · your own AI key on Starter

Draw the thing
in your head.

9 workstations. 110 engines. One sentence away.