CircuitLab

What CircuitLab does

CircuitLab, Inc. is a privately held Delaware-incorporated software company founded in 2012 and headquartered in Mountain View, California, with a workforce of 1-10 employees. The company provides an in-browser schematic capture and circuit simulation platform built on JavaScript and HTML5, eliminating the installation friction associated with traditional desktop EDA tools such as LTSpice. Its proprietary technology stack includes an extended-precision numerical solver core, a mixed-mode event-driven simulation engine with SPICE-like component models, and patented-pending "Smart Wires" technology that accelerates schematic entry. The platform supports analog and digital co-simulation, frequency-domain analysis, parameter sweeping, Laplace transfer function blocks, and presentation-quality schematic exports (PDF/PNG/EPS/SVG).

The product portfolio is anchored by a single unified web application offered through multiple subscription tiers: a free CircuitLab Micro tier for non-commercial hobby and educational use; intermediate Hacker Lite and Hacker tiers for power hobbyists; CircuitLab Pro at $399/year or $39/month, which authorizes commercial use and unlocks unlimited simulations, cloud storage, and the extended-precision solver; and CircuitLab Enterprise with a 10-seat minimum, team license management, and PO/wire payment options for organizational deployment. The company also sells academic site licenses to universities and schools, and operates the free "Ultimate Electronics" interactive textbook (integrated with hundreds of live simulations) and an Electronics Q&A community forum.

The business operates on a product-led growth model with a freemium funnel: users discover and start using CircuitLab instantly via a browser without installation, share circuits through unique URLs, and upgrade to paid tiers for commercial use rights and advanced features. CircuitLab has historically been bootstrapped — it participated in Y Combinator with FundersClub as a co-investor in 2013 but no material primary capital raise is disclosed — and Mike Robbins and Humberto Evans are identified as co-founders. Marketing relies primarily on community engagement, blog content, video tutorials, and curriculum resources rather than paid acquisition.

Name

CircuitLab

Legal name

CircuitLab, Inc.

Website

https://circuitlab.com

Company type

Private

Founded year

2012

Operating status

Operating

Headcount range

1–10 employees

Short description

CircuitLab provides a browser-based schematic capture and circuit simulation platform serving professional engineers, students, and electronics hobbyists. It operates a product-led freemium model with Pro and Enterprise subscription tiers and academic site licenses.

Ownership category

akta.pro rank

Product category

Electronic Design Automation (EDA) Software

NAICS

Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515)

SIC

Instruments For Meas & Testing Of Electricity & Elec Signals (3825)

akta.pro industry

PRIMARYHDAGAEAC

Semiconductor & Electronics Simulation (device physics, EDA/TCAD twins)

Hardware, Technology & Telecom/Quantum Computing/Quantum Simulation & Digital Twins

Keywords

• Circuit simulation software
• Schematic capture tools
• Electronic design automation
• Browser-based EDA
• Analog digital simulation

Headquarters

HQ city

Mountain View

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Software

Cost components

Personnel, Technology or R&D, Operations, Infrastructure, Marketing or Sales

Revenue model

1. Subscription Revenue - CircuitLab Pro: Individual subscription tier at $399/year or $39/month, providing authorized commercial use, unlimited simulations, cloud storage, ad-free experience, and access to advanced features like extended-precision numerical core and parameter sweeping.
2. Subscription Revenue - CircuitLab Enterprise: Team license tier with minimum 10 seats, includes team license management, pay by PO/check/wire transfer options, and enterprise support with response within 24 hours. Pricing not publicly disclosed.
3. Academic Site Licenses: Site licenses sold to schools and universities for educational access, complementing individual memberships as a revenue stream.
4. Freemium Access: Free tier providing basic circuit capture and limited simulation for non-commercial hobby and educational use, with paid tiers required for commercial applications.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

CircuitLab provides a browser-based schematic capture and circuit simulation platform that requires no installation. Users can design, analyze, and simulate analog and digital electronic circuits directly in the browser, with features including a proprietary extended-precision simulation engine, mixed-mode analog/digital co-simulation, Smart Wires schematic entry, and presentation-quality schematic exports. The platform is offered via a freemium model with paid Pro and Enterprise subscription tiers that authorize commercial use.

Product overview

CircuitLab offers a single unified web-based platform for schematic capture and circuit simulation. The core product provides in-browser schematic editing and analog/digital circuit simulation. The portfolio includes two paid subscription tiers (CircuitLab Pro and CircuitLab Enterprise) for commercial use, along with a free interactive textbook (Ultimate Electronics) and a community Q&A forum. The Pro and Enterprise plans unlock unlimited simulations, extended-precision solvers, presentation-quality exports, and team management features.

Differentiator

Problem solved

Functional benefit

Brands

• CircuitLab Pro: Professional membership tier with commercial use authorization, unlimited simulations, and advanced features
• CircuitLab Enterprise
• CircuitLab Micro
• CircuitLab Hacker Lite
• CircuitLab Hacker
• Ultimate Electronics

Products and services

• CircuitLab Browser-based schematic capture and circuit simulation platform that allows users to design, analyze, and simulate analog and digital electronic circuits without installing any software. Includes a schematic editor, mixed-mode simulation, SPICE-like component models, vector schematic exports, and cloud storage for circuits. Used by students, hobbyists, and professional engineers for circuit design, learning electronics, and rapid prototyping before building physical hardware.
• Ultimate Electronics: Practical Circuit Design and Analysis Free interactive online textbook covering practical circuit design and analysis, integrated with hundreds of CircuitLab example circuits and simulations. Targeted at students, educators, hobbyists, and engineers learning or teaching electronics fundamentals.

Quantifiable outcome

• 188,023 simulations and 8,888 hours of usage in 30-day period
• +2 more outcomes

Named customers2 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Falstad Circuit Simulator: Paul Falstad's free browser-based interactive circuit simulator is the most direct functional comparable to CircuitLab — both deliver in-browser analog/digital circuit simulation with no installation, targeting students and hobbyists.
• EveryCircuit: EveryCircuit is a browser- and mobile-based analog circuit simulator with a freemium model and animated current/voltage visualization — directly comparable in delivery model (in-browser) and target audience (learners and hobbyists).
• EasyEDA: EasyEDA is a browser-native EDA suite combining schematic capture, SPICE simulation, and PCB layout in a single web app — directly comparable as a zero-install, browser-first EDA platform serving hobbyists and small professional teams.
• PartSim: PartSim, operated by Mouser/ECIA, is a browser-based circuit simulator with a free tier that lets users simulate and share schematics — comparable as a no-install, web-delivered SPICE-style simulator aimed at engineers and students.

Broad incumbents

• LTspice: Analog Devices' LTspice is the dominant free, professional-grade SPICE simulator with deep model libraries and a large installed base among analog/RF engineers — the primary incumbent CircuitLab is positioned against for professional users.
• TINA-TI / TINA Design Suite: Texas Instruments' TINA is a free (TINA-TI) and commercial SPICE-based schematic capture and simulation suite widely used by students and engineers — comparable as an established free simulation platform with educational reach.
• NI Multisim: National Instruments' Multisim is a professional SPICE-based schematic capture and circuit simulation platform used widely in academic and professional settings — comparable as a broader incumbent offering simulation within a fuller EDA workflow.
• Autodesk Fusion Electronics: Autodesk's Fusion 360 Electronics (formerly EAGLE) combines schematic capture, SPICE simulation, and PCB layout in a unified cloud-connected platform — comparable as a broad incumbent moving toward browser-delivered EDA workflows that overlap with CircuitLab's space.

Emerging players

• KiCad: KiCad is a free, open-source EDA suite spanning schematic capture, SPICE simulation, and PCB layout — comparable as a no-cost alternative growing rapidly among hobbyists, educators, and even professional engineers, with a community-driven model similar in spirit to CircuitLab's.
• CircuitVerse: CircuitVerse is a free, browser-based digital logic circuit simulator built for education — comparable as a no-install educational simulation tool targeting students and integrated with university curricula.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/playlist?list=PL-pbIBjpFfqBBYQEry-K-fHfqY7DPW9T3
• Xx.com/circuitlab

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds1 record

Investors2 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about CircuitLab