The lean tools directory · 2026

Find lean tools that earn their place in your stack.

Independent guides, sourced tool profiles and free calculators for lean manufacturing, continuous improvement and lean startup teams. Skip the bloat and pick what fits how you work.

Explore categories Calculate your OEE

How we publish

Every profile is researched from public sources, and nobody can pay for placement. See the methodology →

categories: 22categories
lean practices: 4lean practices
terms explained: 78terms explained
paid placements: 0paid placements

Tool directory

Start from the practice you run

22 categories across 4 lean practices. Each one comes with a buying guide, the questions to ask vendors and the techniques it supports.

All categories →

Lean Manufacturing Software

OEE, andon, TPM, work instructions and e-kanban for factories.

Continuous Improvement Software

Kaizen, daily management, audits and root cause tools.

Lean Six Sigma Tools

SPC, statistics, value stream mapping, CAPA and FMEA software.

Lean-Agile Software

Kanban, flow metrics, portfolio and retrospective tools.

New every day

Recently added tools

We research and publish new tools in small daily batches. 75 tools are live so far.

Brightidea

Price on request

Enterprise innovation pipeline software for running idea challenges and moving selected ideas into projects.

Idea managementInnovation campaigns

Augmentir

Price on request

Connected worker suite with daily management boards, digital work instructions, skills and frontline issue capture.

Daily managementTiered huddlesStandard Work

SyncKanban (Synchrono)

Price on request

E-kanban application that sizes loops from demand trends and sends real-time replenishment signals to suppliers.

E-KanbanPull SystemKanban Sizing

Azumuta

Price on request

Belgian platform for digital work instructions, skills matrices, audits and quality checks on the shop floor.

Standard WorkSkills matrixLayered Process Audits

Autodesk FlexSim

Price on request

3D simulation software for modeling production lines, buffers and material flow to test layouts and lean changes.

SimulationLine BalancingBottleneck Analysis

Kahuna

Price on request

Skills and competency management platform that validates workforce skills, tracks certifications and shows coverage for manufacturing and other industrial teams.

Skills matrixCompetency managementQualification tracking

Amper

Price on request

IoT-sensor production monitoring that tracks uptime, OEE and downtime reasons with ERP links; now sold by ECI Software Solutions.

OEEDowntime TrackingScheduling

Fabrico

Published pricing

Combined CMMS, OEE and digital andon platform that turns line stoppages into maintenance work orders.

TPMOEEAndon

What is a lean stack?

The smallest set of tools that keeps improvement moving

Teams often end up with tools added one at a time. A lean stack is the opposite: one tool per practice, each earning its place by supporting the loop every lean team runs. See the work, measure the flow, solve the problem, standardize the fix, then improve again.

Paper and whiteboards are often the right first step. Software comes in when the manual version stops scaling.

Read the guide to building a lean stack

01See the work
02Measure flow
03Solve problems
04Standardize
05Improve again

Stack blueprints

A starting stack for every kind of team

A common order for adding layers. Start at the top and add the next layer only when you need it.

Manufacturing plant

See the line, protect uptime and solve problems at the source.

Software and IT team

Limit WIP, measure flow and forecast without guesswork.

Early-stage startup

Test the riskiest assumption first, then build what customers pull.

CI program office

Align strategy, run the project pipeline and prove results.

Why trust our shortlists

Sourced facts. No paid placement.

Each profile says where its facts come from and when they were checked. No tool has a lean-stack score yet, and none can pay for a better position.

What every profile shows

Sources. Every fact links to the page it came from, with the date it was checked.
Pricing. Published prices and plans, or a plain note that pricing is on request.
Ratings. G2 and Capterra ratings as linked, dated numbers. Never copied review text or an average.
Fit. Strengths, limitations and who it suits, from the vendor's own documentation.

How we research

“Lean is about removing waste. A tool that nobody uses is waste with a subscription fee.”

Independent by design
No tool can pay for a place on a list or a kinder write-up. There is no paid placement.
Sourced, not scored yet
Every profile is built from public sources that are linked and dated. We have not scored any tool.
Lean, not long
We list the tools that fit a lean practice, with their sources. Shortlists are published in batches after a criteria check.

Read the full methodology

Free lean calculators

Run the numbers in seconds

All calculators →

OEE Calculator

Availability, performance and quality from one shift's numbers.

Open calculator

Takt Time Calculator

The pace your process must keep to meet customer demand.

Open calculator

Little's Law Calculator

See how work in progress drives cycle time.

Open calculator

Six Sigma Calculator

Sigma level, DPMO and yield from your defect counts.

Open calculator

Process Capability Calculator

Cp, Cpk and the share outside spec from your limits, mean and standard deviation.

Open calculator

Control Chart Calculator

Center line, control limits and out-of-control points from your own readings.

Open calculator

Flow Efficiency Calculator

The share of lead time spent on real work, step by step.

Open calculator

Kanban Calculator

How many kanban cards or bins a pull loop needs.

Open calculator

Guides

Practical lean guides

All guides →

October 4, 2026 · 6 min read

Kaizen event: meaning, steps and a 3-5 day agenda

A kaizen event is a focused workshop that improves one process in 3-5 days. Learn the meaning, roles, agenda, steps, measures and common mistakes.

October 4, 2026 · 5 min read

Process improvement methodologies: 9 methods compared

Process improvement methodologies compared: PDCA, lean, kaizen, Six Sigma, TQM, theory of constraints, BPR and retrospectives, with how to choose and combine.

October 4, 2026 · 5 min read

Root cause analysis example: 6 worked samples and a template

A root cause analysis example for six settings, from a machine stoppage to warehouse picking errors, plus root cause statement wording and common mistakes.

Lean glossary

Lean terms in plain language

From andon to yamazumi: 78 techniques explained in a few sentences, each linked to the tools that support it.

Open the glossary

A faster way to choose

How to pick lean software without losing a quarter to demos

The usual way to buy improvement software is to collect vendor names, book demos and compare feature lists. It takes weeks, every demo looks good, and the options become hard to compare. A lean approach starts from the problem and only then looks at products.

Name the practice you need to support and the pain the manual version is causing. Then shortlist two or three tools that fit that practice, and test them with real work from one team for a couple of weeks. Decide in advance what success looks like, such as shorter huddles, fewer overdue actions or faster cycle times, and let the pilot decide.

lean-stack exists to make the shortlisting part fast. Every category page explains what matters, what to avoid and what to ask vendors. Tools are added in batches after a criteria check, and every fact links to its source, so you can check what you read.

Your two-week tool pilot

1Name the practice and the pain
2Shortlist two or three tools that fit
3Agree what success looks like
4Pilot with one team on real work
5Decide, standardize, then scale

FAQ

Questions, answered

What is lean software?

Software that supports a lean practice: making work visible, limiting work in progress, solving problems at the root, standardizing work or testing ideas cheaply. What makes a tool lean is what it helps a team do, whatever its name.

Do I need software to practice lean?

No. Many lean practices start with paper, whiteboards and a stopwatch. Software earns its place when the manual version stops working, usually because teams are spread out, you need history or reporting takes too long.

How does lean-stack choose and order tools?

Tools are checked against our listing criteria and researched from the vendor's public pages, with every source linked and dated. Lists are alphabetical. We don't score tools yet, and no one can pay for placement.

Is lean-stack free to use?

Yes. Browsing, guides, the glossary and every calculator are free, with no sign-up.

Can I suggest a tool?

Yes. Vendors and users can submit tools through the Get listed page. Every submission is checked against the same listing criteria.

For vendors

Built a lean tool?

Submit it for review. Every tool is checked against our listing criteria and researched from public sources. Approved tools join their category in the next published batch.

Get listed How we research