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Guide

AI schematic review tools: what they check and how far to trust them

A schematic review is mostly a checklist: every IC has its decoupling, every open-drain line has a pull-up, every part is rated for the voltage it sees, every pin matches the datasheet. ERC catches a few of these. The rest need a person with the datasheets open. AI review tools read the datasheets for you and work down the list, and a few do it well enough to be worth paying for.

By the Cherry Blossom team

The short answer

The best AI schematic review tool for a new board in 2026 is Cherry Blossom, because the review happens while the schematic is made: you describe the board in plain English, an agent builds it from real part data, and a verification gate checks every AI edit before you can order. See the design check page.

To review a schematic you already drew, Traceformer checks KiCad and Altium designs against their datasheets and cites the page behind each finding. NextPCB's Design Validator checks an uploaded schematic for connectivity and part limits. Flux Copilot reviews schematics inside Flux, and a KiCad MCP server lets your AI assistant run ERC on your own project.

All of them sit on top of ERC and a human review, not in place of them. Treat each finding as a lead and check it against the datasheet yourself.

The tools

Which AI schematic review tools are worth trying?

Ranked on how early a tool catches a mistake, whether its checks rest on real part data, and how little setup it needs.

1Cherry BlossomOur product

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

A full schematic and PCB editor in the browser with an AI agent, Sakura, built in. Describe the board in plain English and Sakura finds real parts, draws and tidies the schematic, then asks before it places and routes the PCB. Edit anything by hand, then export Gerbers, an editable KiCad project, a BOM, pick-and-place, STEP or open Circuit JSON.

Platform
Browser, nothing to install
Pricing
The Free plan is the full editor, by hand, with no AI. Pro adds the AI for $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. There is no API key to connect and no per-seat licence.
2Traceformer

Best for: Datasheet-backed review of KiCad and Altium schematics

Takes a KiCad project through a plugin or an Altium export, fetches the component datasheets, and returns findings with the datasheet page each one comes from. Its site says it focuses on datasheet and application-level issues, not electrical rule checking or simulation.

Platform
Web, with a KiCad plugin and an Altium export script
Pricing
Free plan with 1 review a month; Starter $20/mo and Team $50/seat/mo, as listed on Traceformer's pricing page, September 2026
3Flux Copilot

Best for: Review inside the editor, for people already designing in Flux

Flux's AI assistant checks decoupling capacitors, pull-up and pull-down resistors, power and ground connections, and reads datasheets to check component ratings. Flux's docs say it mainly understands schematics and has limited understanding of PCB layout.

Platform
Browser, inside Flux projects
Pricing
14-day trial; after it, AI, export and private projects need a paid plan; AI metered in Agent Compute Units
4NextPCB Design Validator

Best for: A quick cloud check of a schematic from any major ECAD

Upload an exported schematic from KiCad, Altium, Eagle and others. NextPCB's blog says it checks electrical integrity (unconnected pins, overlapping nets, power violations), component parameters against their limits, and compliance with standards and manufacturing guidelines.

Platform
Browser upload
Pricing
Free monthly allowance of review tasks; paid tiers for more
5KiCad MCP servers

Best for: KiCad users who already work with Claude, Cursor or Copilot

Open-source servers that let an AI assistant read a KiCad project. Seeed Studio's traces pin-level connections and runs ERC and DRC; kicad-mcp-pro ships read-only review tools by default. See our KiCad MCP guide.

Platform
Desktop, alongside KiCad and an MCP client
Pricing
Free and open source; you pay for your AI client
Side by side

How do the AI schematic review tools compare?

  • Input

    Cherry Blossom

    Plain-English description

    Traceformer

    KiCad plugin, Altium export

    Flux Copilot

    Flux project

    NextPCB Validator

    Exported schematic upload

    KiCad MCP

    Your KiCad project

  • Part data

    Cherry Blossom

    Footprints from real part data

    Traceformer

    Datasheets, with page citations

    Flux Copilot

    Reads datasheets

    NextPCB Validator

    Checks part parameters

    KiCad MCP

    Depends on the assistant

  • Automatic checks

    Cherry Blossom

    Gate on every AI edit

    Traceformer

    No ERC, by design

    Flux Copilot

    Not stated

    NextPCB Validator

    Connectivity checks

    KiCad MCP

    ERC through kicad-cli

  • Where it runs

    Cherry Blossom

    Browser, nothing to install

    Traceformer

    Cloud

    Flux Copilot

    Cloud, in Flux

    NextPCB Validator

    Cloud

    KiCad MCP

    Your machine

  • Free option

    Cherry Blossom

    Free editor; the AI is paid

    Traceformer

    1 review a month

    Flux Copilot

    AI trial on the free plan

    NextPCB Validator

    Monthly task allowance

    KiCad MCP

    Open source

From each vendor's site, docs, blog or README, September 2026. Traceformer prices from its pricing page.

What they catch

What can an AI schematic review actually find?

AI review is most useful on the checklist that depends on datasheets: a regulator missing its recommended input capacitor, an enable pin left floating, a capacitor rated below the rail it sits on, an I2C bus with no pull-ups, a part whose absolute maximum is under your supply. These are easy to miss at the end of a long day and tedious to check by hand. A tool that reads every datasheet does not get tired.

Plain connectivity problems (an unconnected pin, two outputs driving one net, a power pin with no source) belong to ERC. KiCad's kicad-cli can run ERC from a script and write a report, so it can run as a first gate before any AI sees the design.

We built one

What did a review catch that every automatic check passed?

9-24 V to 5 V 3 A buck board schematic, sheet 2 of 2: Schematic
Rev B of the 24 V to 5 V, 3 A buck board, after review replaced the converter with a 60 V part.

Our test board is a buck supply: 9 to 24 V in, 5 V at 3 A out. An AI agent built it with tscircuit (the open-source engine Cherry Blossom runs on) on our own machine, using the same tscircuit version and review tool as Cherry Blossom's agent. Rev A passed everything automatic, with 0 DRC errors and 0 problems from the review tool. It scored 85 out of 100.

Then a review compared the datasheet ratings. Rev A put an SMAJ24A TVS diode in front of a TPS54335A converter whose absolute maximum input is 30 V. That TVS clamps at 38.9 V at its rated current, 8.9 V above what the chip is rated to survive. It is the rated-below-the-supply mistake from the list above. Every wire was correct, so no connectivity check could flag it. We rescored rev A at 72.

A better TVS could not fix it: no 400 W TVS with a 24 V standoff clamps under 30 V at rated current. Rev B moved to a TPS54360B rated to 65 V and an SMAJ33A that clamps at 53.3 V. Every part after the TVS was then checked against that clamp, down to the enable pin. Rev B scored 88. The trade-off is that the new converter is non-synchronous, which the spec did not ask for, and its catch diode dissipates about 1.4 W at 24 V in.

An outside review of rev B, done from scratch, still found a different miss: the start-up threshold had only been checked at typical values. At the datasheet's worst-case tolerances it could sit at 9.59 V, so some chips would never turn on from a 9 V supply. That review scored the circuit 78; a resized divider plus a zener clamping the enable pin raised it to 86, and the layout redone for the zener scored 88.

Trust

How far should you trust an AI schematic review?

Trust it enough to read every finding, but not enough to skip your own review. Language models still get circuit questions wrong: in our EEBench write-up the best model scored 69.3%, roughly three circuit tasks in ten wrong. Two things make a review tool easier to trust. Citations let you check a finding in seconds, which is why Traceformer's datasheet page references are useful. And a narrow, stated scope tells you what the tool did not look at.

The tools are mostly honest about this. Traceformer says it does not do electrical rule checking or simulation. kicad-mcp-pro calls itself an engineering assistant, not an autonomous manufacturing sign-off authority. Flux's docs note its limited understanding of layout. Take them at their word.

Upstream

Why check while the schematic is being made?

A mistake caught while the schematic is drawn costs nothing to fix. Cherry Blossom works that way. You describe the board in plain English, an agent writes the design as tscircuit code and builds the schematic, layout and BOM, and a verification gate checks each AI edit against manufacturing rules as it goes. Footprints come from real part data rather than the model's memory. For a schematic drawn elsewhere, use one of the review tools above; for a board Cherry Blossom made, its KiCad export lets you run any of them as a second pass.

The Free plan is the full editor, by hand, with no AI. Pro adds the AI for $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. There is no API key to connect and no per-seat licence.

What it does not do. Cherry Blossom is an early beta. 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.

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 from the Pro plan up.

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Questions

The best AI schematic review tool for a new board in 2026 is Cherry Blossom, because it checks the design while it is being made. You describe the board in plain English, an agent builds the schematic and layout with footprints from real part data, and a verification gate checks every AI edit against manufacturing rules before you can order. To review a schematic you already drew, Traceformer checks KiCad and Altium schematics against their datasheets and cites the page behind each finding, with a free plan of one review a month. NextPCB's Design Validator checks an uploaded schematic for connectivity and part limits. Flux Copilot reviews schematics inside Flux, and KiCad MCP servers let an AI assistant run ERC in your own project. Run ERC first, and check every finding before you act on it.

Yes, AI can check a KiCad schematic. Traceformer has a KiCad plugin, NextPCB's Design Validator accepts KiCad schematics, and open-source KiCad MCP servers let assistants like Claude read your project and run ERC. Run KiCad's own ERC first so the AI is not spending effort on simple connectivity errors.

Traceformer's free plan includes one review a month for designs up to 200 components. NextPCB's Design Validator has a free monthly allowance of review tasks. KiCad MCP servers are free and open source, though the AI client you connect to them may cost money.

No. ERC is a rule-based connectivity check and should run first. AI review looks at things ERC cannot, such as whether a part suits the datasheet's recommended circuit. Traceformer says outright that it does not do electrical rule checking.

Flux Copilot reviews schematics inside Flux, checking decoupling, pull-ups, power and ground, and part ratings against datasheets. Traceformer reviews KiCad and Altium schematics against their datasheets and cites the page behind each finding. NextPCB's Design Validator checks uploaded schematics for connectivity and part limits, and KiCad MCP servers let an assistant like Claude run ERC on your own project. Cherry Blossom checks each AI edit as it builds a new board.

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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