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Alternatives

Cherry Blossom vs Flux: a Flux.ai alternative

Both run in the browser and both put an AI next to a PCB. Where they part ways is who does the drawing. In Flux you design the board and a copilot helps. In Cherry Blossom you describe the board, an agent designs it, and a verification gate checks the result before you can order.

By Arnaud and Anass

The short answer

The best Flux.ai alternative is Cherry Blossom for anyone who wants the AI to design the board rather than assist with it: you describe the board in plain English and get a checked schematic, PCB layout and fab files in the browser.

Every AI edit passes a verification gate, footprints come from real part data, and the board exports as an editable KiCad project, so starting from a prompt does not lock you in. To change the board, you ask for the change.

Flux still suits teams who want to place and route by hand in a shared browser editor, with several people on the same schematic at once.

The reasons

Why look for a Flux alternative?

Flux is a capable editor, so the reasons to look elsewhere are about fit more than quality. Two stand out. After the 14-day trial, Flux's own FAQ says a free account keeps public projects and the community, while editing private projects, exporting and using the AI all need a paid plan. And the AI is a copilot: you still place the parts, wire the schematic and route the board yourself.

If what you wanted was for the AI to do that drawing, or you design a board now and then and would rather not learn a full ECAD to do it, a tool built the other way round is worth a look. That is the prompt-to-PCB workflow Cherry Blossom is built on.

The difference

Who holds the pen?

Flux is an electronics design suite in a browser tab. It calls its AI an AI hardware engineer, and the paid plans meter it in Agent Compute Units. You place parts, wire the schematic and route the board, and you hand the copilot the parts you would rather not do by hand.

Cherry Blossom starts from the other end, and there is no canvas to draw on. An agent running in a cloud sandbox writes the board as tscircuit code, and the schematic, PCB, 3D and BOM views are rendered from what it builds. Every edit goes through a verification gate, and footprints come from real part data instead of a model's guess.

If you already know exactly how you want the layout to look, a drawing tool gets out of your way. If you know what the board has to do and want a manufacturable board fast, a tool that drafts the whole thing gets you there sooner.

Side by side

How do Flux and Cherry Blossom compare?

  • How you design

    Cherry Blossom

    Describe it; the agent builds the whole board

    Flux

    Draw it yourself, with an AI copilot on call

  • Manual editing

    Cherry Blossom

    No. Changes go through the agent; finish by hand in KiCad

    Flux

    Yes, a full schematic and PCB editor

  • Checking before fab

    Cherry Blossom

    Verification gate on every AI edit, DRC before ordering

    Flux

    Copilot design review and built-in checks

  • Collaboration

    Cherry Blossom

    Single account; no live multi-user editing

    Flux

    Real-time multiplayer editing, team workspaces

  • Exports

    Cherry Blossom

    Gerbers, KiCad project, BOM, pick-and-place, STEP, Circuit JSON

    Flux

    Gerbers and other fab outputs; see Flux's docs for formats

  • Pricing model

    Cherry Blossom

    $20/mo Pro, $140/mo Ultra, AI included

    Flux

    14-day trial; paid plan needed for AI, export and private projects; AI metered in ACUs; Teams billed per editor

Flux details from flux.ai/pricing, September 2026. Flux does not print its paid prices on that page's plan cards, so we have not quoted any.

Cost

What does each one cost?

Flux starts with a 14-day trial. After that, its FAQ says a free account keeps access to public projects and the community, and editing private projects, exporting and using the AI need a paid plan. Build includes AI usage with optional pay-as-you-go on top. Pro adds hands-on guidance from Flux's hardware engineers. Teams is billed per editor, annually, with a pooled AI allowance. On every plan, AI usage is counted in Agent Compute Units that replenish monthly.

Cherry Blossom has no manual-only tier, because there is no manual editor to give away. Pro is $20 a month with 4M AI credits and 600 AI actions a day. Ultra is $140 a month with 32M credits and the frontier models. Usage past the allowance is $5 per 1M credits, only if you turn it on. The AI is included, with no API key and no per-seat licence. The pricing page has the details.

Real work ends up on a paid plan with either tool. What differs is what the money buys: with Flux, an editor plus metered AI; with Cherry Blossom, the AI that does the drawing.

Who should stay

When is Flux the better choice?

Flux can still be the better fit in a few cases.

  • You want to route the board yourself and keep an AI around for the tedious parts.

  • Several engineers need to edit the same design at the same time.

  • Your team wants the enterprise extras Flux lists on its Enterprise plan, such as SOC 2 and an SLA.

Who should switch

When is Cherry Blossom the better choice, and how do you move over?

  • You would rather describe the board in a sentence than draw it.

  • You want the whole path in one place: schematic, layout, BOM, and Gerbers checked against manufacturing rules before you order.

  • You want to own the design in open formats. Boards export as an editable KiCad project and as open Circuit JSON.

  • You want to order from the same place, through the PCBWay hand-off, once the board passes its checks.

Moving over starts with a description rather than a file. Write down what the board has to do, including any parts and connectors you have already settled on, and send that as your first message. The agent drafts the schematic and layout, and you refine it by asking for changes in the same chat. Boards live in your account and each one can hold several chats, so you can try a variant without losing the first conversation.

Leaving is covered too. Cherry Blossom exports an editable KiCad project, Gerbers with drill files, a CSV BOM and pick-and-place files, so a board you start here can be finished by hand in KiCad. The KiCad export guide lists what is in the project.

Current limits. Cherry Blossom is an early beta. You change a board by asking the agent, not by dragging traces yourself, so fine manual layout happens after a KiCad export. It is not a circuit simulator, it has no real-time multi-user editing, and it is not built for high-speed or RF sign-off.

Everything else

Where do both sit among AI PCB tools?

1Cherry BlossomOur product

Best for: Going from a plain-English description to a fab-ready board, in the browser

You describe the board in plain English and an AI agent writes it as code, builds it, and shows you the schematic, PCB layout, 3D view and BOM. Footprints come from real part data, and a verification gate checks the board before you can order it. Export Gerbers, an editable KiCad project, a BOM and pick-and-place files, or open Circuit JSON.

Platform
Browser, nothing to install
Pricing
Pro is $20 a month with 4M AI credits and 600 AI actions a day. Ultra is $140 a month with 32M credits and the frontier models. Usage past the allowance is $5 per 1M credits, only if you turn it on. The AI is included, with no API key and no per-seat licence.
2Flux

Best for: Collaborative browser ECAD with an AI copilot

A full schematic and PCB editor in the browser with real-time multiplayer editing. Its AI assistant helps place parts, answers questions from datasheets and reviews designs, and is metered in Agent Compute Units.

Platform
Browser
Pricing
14-day trial; paid Build, Pro and per-editor Teams plans; Enterprise on request

If you are weighing more than these two, the full roundup of AI PCB design tools covers layout-only tools like Quilter and DeepPCB and schematic front ends like Celus and Circuit Mind.

See it on your own board

The quickest way to judge any of this is to describe a board and read what comes back: the schematic, the layout, and what the verification gate says about it. It runs in the browser, with the AI included.

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Questions

The best Flux.ai alternative is Cherry Blossom if you want the AI to design the whole board instead of helping you draw it. You describe the board in plain English, and an AI agent writes the design, builds it, and shows you the schematic, PCB layout, 3D view and BOM. A verification gate checks every AI edit, footprints come from real part data, and a design rule check runs before you can order. It runs in the browser with nothing to install and no per-seat licence. Flux works the other way round: it is a manual ECAD in the browser where you place parts and route traces yourself, with an AI copilot and real-time multi-user editing for teams. If you want to keep drawing by hand with a team, Flux fits. If you want a checked board from a sentence, pick Cherry Blossom. It exports an editable KiCad project, so you can still finish by hand.

Flux starts with a 14-day trial. After it, its FAQ says editing private projects, exporting and using the AI need a paid plan. Its Build and Pro plans include AI usage metered in Agent Compute Units, and Teams is billed per editor, annually. Flux does not print those prices on its plan cards, so check flux.ai/pricing for current figures. Pro is $20 a month with 4M AI credits and 600 AI actions a day. Ultra is $140 a month with 32M credits and the frontier models. Usage past the allowance is $5 per 1M credits, only if you turn it on. The AI is included, with no API key and no per-seat licence.

Yes. Cherry Blossom exports an editable KiCad project, fab-ready Gerbers with drill files, a CSV bill of materials, pick-and-place files, 3D models including STEP, and the underlying Circuit JSON, which is an open format. You can still open the board without the tool that made it.

No. Boards belong to one account and there is no live multi-user editing. That is one of Flux's real strengths, and if several engineers need to edit the same schematic at once, Flux is the better fit today.

Describe a board. See what comes back.

Schematic, layout and a verification gate, in the browser. Exports to Gerbers and KiCad.

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