10 Best Diagramming Software of 2026

1. 1

   draw.io

   A free, open-source diagram editor that runs in the browser or as a desktop app and saves files to storage you choose.

   9.2overall

   A free, open-source diagram editor that runs in the browser or as a desktop app and saves files to storage you choose.

   Best forteams that want free diagramming with no seat limits

   Adoption data

   100M+draw.io says its editor has more than 100 million users worldwide.

   draw.io, draw.io home page (2026): “100M+ Users worldwide”

   draw.io is the default free choice for flowcharts, network maps and architecture diagrams. The editor opens in a browser with no account and no credit card, and a desktop app covers offline work. Instead of hosting your files, draw.io saves them to the storage you already use, such as Google Drive, OneDrive, SharePoint, GitHub or a local folder, and the company says it cannot access that data. Native integrations cover Confluence, Jira, VS Code, Notion and Google Docs, and diagrams export to SVG, PNG or PDF or embed as editable views. Real-time collaboration with shared cursors is included. The source code is Apache 2.0 licensed and the site states there is no Enterprise tier for SSO. The trade-off is that draw.io has no central workspace, admin console or data-linked shapes of its own, so teams that want governance or live data in diagrams will find more in Lucidchart or Visio. draw.io reports more than 100 million users, tied with Lucid for the largest figure on this list.

   Strengths

   • +No paid tier: SSO is not held back for an Enterprise plan
   • +Apache 2.0 licensed source code
   • +Diagram files created in 2005 still load in the current app

   Limitations

   • −No hosted workspace of its own: you bring your own storage
   • −Fewer built-in AI and data-linking features than Lucidchart
   • −Collaboration depends on the storage service you connect

   Summarydraw.io is the best diagramming software for most teams because it is free forever with real-time collaboration and reports 100M+ users. Teams that need admin controls, data linking or a hosted workspace should pay for Lucidchart instead.

2. 2

   Lucidchart

   A cloud diagramming app from Lucid Software for flowcharts, org charts, process maps and technical diagrams.

   9.1overall

   A cloud diagramming app from Lucid Software for flowcharts, org charts, process maps and technical diagrams.

   Best forteams that need a hosted workspace with admin controls

   Adoption data

   100M+Lucid Software says more than 100 million individual users and 99% of the Fortune 500 use its products, which include Lucidchart and Lucidspark.

   Lucid Software, About Lucid (2026): “100M+ individual users 99% of Fortune 500”

   Lucidchart is the most complete hosted diagramming workspace on this list. The free plan is a trial in practice, with 3 editable documents, 75 shapes per document and 100 templates. Individual, at $9 per month billed yearly, removes those caps and adds premium shape libraries, 1 GB of storage and Visio import and export, which matters for teams moving off Visio files. Team, at $10 per user per month billed yearly, adds revision history with versioning, password protected publishing, a developer platform and integrations with Microsoft 365, Confluence, Jira, LeanIX and Ardoq. Enterprise adds SAML, enforceable sharing restrictions, Salesforce integration, Process Capture and Lucidspark for whiteboarding. The free trial lasts 7 days and asks for payment details up front. Lucid reports more than 100 million individual users and says 99% of the Fortune 500 use its products, a company-wide figure that also covers Lucidspark. Teams that only need occasional flowcharts can get by on draw.io for free.

   Strengths

   • +Team plan costs $10 per user per month billed yearly
   • +Visio import and export from the Individual plan
   • +Used by 99% of the Fortune 500, per Lucid

   Limitations

   • −Free plan caps you at 3 editable documents
   • −Trial lasts 7 days and needs payment details at sign-up
   • −Lucidspark whiteboarding is bundled only on Enterprise

   SummaryLucidchart is the best paid diagramming software for teams because its $10 Team plan adds versioning plus Confluence, Jira and Microsoft 365 integrations. Solo users with light needs can stay on draw.io for free.

3. 3

   Microsoft Visio

   Microsoft's diagramming app, sold as web and Teams plans with an optional Windows desktop app.

   8.8overall

   Microsoft's diagramming app, sold as web and Teams plans with an optional Windows desktop app.

   Best fororganizations standardized on Microsoft 365

   Adoption data

   75 millionMicrosoft said in 2021 that 75 million people could create, edit and share Visio diagrams as part of their Microsoft 365 subscription; this counts people with access, not active users.

   Microsoft, Microsoft Visio is rolling out to Microsoft 365 commercial subscribers (2021): “Today, 75 million people can create, edit, and share diagrams”

   Visio is the natural pick for companies that already run on Microsoft 365. Microsoft includes a basic Visio web app in Microsoft 365 commercial plans, so many staff can start diagramming at no extra cost. Visio Plan 1, at $5 per user per month paid yearly, adds the full web and Teams apps with in-app comments and secure sharing across the organization. Visio Plan 2, at $15 per user per month paid yearly, adds the desktop app, data graphics that link shapes to real-time data, Power BI visuals, IEEE standard shapes, accessibility checks and 2 GB of OneDrive storage. The limits are clear: the desktop app needs Windows, Plan 1 has no desktop app, and admins buying online must commit to a year. Microsoft said in 2021 that 75 million people could use Visio through Microsoft 365, a count of access rather than active use. Mac-heavy teams, or those outside Microsoft 365, will find Lucidchart or draw.io easier to roll out.

   Strengths

   • +Cheapest verified paid seat on this list at $5 per user per month
   • +Works inside Microsoft Teams
   • +Desktop app on Plan 2 for detailed technical drawings

   Limitations

   • −Desktop app runs on Windows only
   • −Plan 1 does not include the desktop app
   • −Annual commitment required for admins buying online

   SummaryMicrosoft Visio is the best diagramming software for Microsoft 365 companies because Plan 1 adds full web and Teams editing for $5 per user per month. Mac teams should look at Lucidchart, since the Visio desktop app is Windows only.

4. 4

   Miro

   A visual workspace whose diagram maker adds expert shape libraries and AI diagram generation to an online whiteboard.

   8.5overall

   A visual workspace whose diagram maker adds expert shape libraries and AI diagram generation to an online whiteboard.

   Best forteams that mix workshops with system diagrams

   Adoption data

   100 millionMiro says more than 100 million users in 250,000 organizations use its visual workspace.

   Miro, About Miro (2026): “Today, more than 100 million users in 250,000 organizations including Salesforce, Asos, WPP, and Cisco depend on Miro”

   Miro is a whiteboard that has grown a serious diagram maker. Its diagramming tools include more than 2,000 expert shapes spanning UML, Kubernetes, Google Cloud and more, with support for BPMN process maps, AWS and Azure architecture and ER diagrams for databases. Miro AI can generate flowcharts, UML diagrams, ER diagrams and process maps from a text prompt, which you then refine by hand. The free plan lets you create unlimited boards but keeps only the three most recent editable, with 7000+ templates. Starter, at $8 per member per month billed yearly, removes the board limit. The appeal is context: a system diagram can sit beside sticky notes, docs and tables from the same planning session. The trade-off is depth, since Miro has fewer data-linked shapes and admin features for diagrams than Lucidchart or Visio. Miro reports more than 100 million users in 250,000 organizations, a figure for the whole workspace rather than diagramming alone.

   Strengths

   • +Diagrams sit on the same board as workshop notes
   • +Largest reported user base among whiteboard-first tools at 100 million
   • +AI drafts UML and ER diagrams from text

   Limitations

   • −Free plan keeps only the 3 most recent boards editable
   • −Priced per member, which adds up for large viewer groups
   • −Built as a whiteboard first, with lighter data linking than Lucidchart or Visio

   SummaryMiro is the best diagramming software for teams that plan and diagram on one canvas because Starter adds unlimited boards and 2,000+ expert shapes for $8 per member. Teams that only draw diagrams get more for less from draw.io or Lucidchart.

5. 5

   Excalidraw

   An open-source virtual whiteboard for hand-drawn style diagrams, with a paid Excalidraw+ workspace for teams.

   8.1overall

   An open-source virtual whiteboard for hand-drawn style diagrams, with a paid Excalidraw+ workspace for teams.

   Best forengineers sketching quick system diagrams

   Adoption data

   135.5kThe open-source Excalidraw repository on GitHub showed 135.5k stars when we checked in November 2026.

   GitHub, excalidraw/excalidraw (2026): “135.5k stars”

   Excalidraw is the quick-sketch option for engineers. The free editor runs in the browser with full drawing tools, one infinite scene, unlimited collaborators, 10 AI requests a day and export to PNG, SVG or a file, with end-to-end encryption locally in the browser. Text to diagram and Mermaid to Excalidraw conversion turn a description or Mermaid code into an editable drawing, which suits system diagrams in design reviews. Excalidraw+, at $6 per user per month, adds unlimited scenes and folders saved to the cloud, sharing with edit or view rights, comments, live presentations, PDF and PPTX export, 100 AI requests a day and an MCP and REST API in public beta, with a 14-day trial. The hand-drawn look is deliberate, which makes Excalidraw a poor fit for formal process documentation or standards-based network diagrams. The open-source repository on GitHub had 135.5k stars in November 2026; GitHub stars measure developer interest, not paying users.

   Strengths

   • +Free plan needs no account and supports unlimited collaborators
   • +Excalidraw+ costs $6 per user per month
   • +MIT licensed open-source editor

   Limitations

   • −Hand-drawn style does not suit formal documentation
   • −Free plan keeps 1 scene in the browser
   • −No large standards-based shape libraries like Visio or Lucidchart

   SummaryExcalidraw is the best diagramming software for quick engineering sketches because the free editor supports unlimited collaborators and Mermaid import. Teams that need formal, standards-based diagrams should use draw.io or Visio.

6. 6

   SmartDraw

   A diagramming and floor-planning app with AI generation, data-backed shapes and integrations for Microsoft and Google tools.

   8.1overall

   A diagramming and floor-planning app with AI generation, data-backed shapes and integrations for Microsoft and Google tools.

   Best forteams that draw both diagrams and floor plans

   Adoption data

   85%SmartDraw says it is used by more than 85% of Fortune 500 companies.

   SmartDraw, SmartDraw home page (2026): “SmartDraw is Used by Over 85% of the Fortune 500”

   SmartDraw covers more ground than most diagram tools: alongside flowcharts, org charts, mind maps and IT diagrams, it draws floor plans, site plans and accident scenes, which is why fire departments, police and construction firms appear among its customers. Its AI generates floor plans, flowcharts, org charts, mind maps and timelines from a prompt. It can build org charts from Entra ID and architecture diagrams from AWS and Azure, and shapes can carry data such as product numbers and costs for generated equipment lists. Admins get SSO provisioning and can keep files in their own storage. Pricing is annual: Individual is $5.75 per month for new customers against a regular $10.95, and Team is $4.95 per user per month introductory with a 3 user minimum. There is no permanent free plan. SmartDraw says more than 85% of the Fortune 500 use it, but it does not publish a user count, so we scored adoption conservatively.

   Strengths

   • +Individual plan is $5.75 per month for new customers, billed annually
   • +Covers floor plans and site plans as well as diagrams
   • +Generates diagrams from Entra ID, AWS and Azure data

   Limitations

   • −$5.75 is an introductory price; the regular price is $10.95
   • −No permanent free plan
   • −Team plan has a 3 user minimum

   SummarySmartDraw is the best diagramming software for teams that also need floor plans because one license covers flowcharts, org charts and CAD-style layouts from $5.75 per month introductory. Software teams focused on system diagrams will find more integrations in Lucidchart.

7. 7

   Creately

   A visual workspace with diagram and whiteboard tools plus products for org charts, process maps and cloud architecture.

   8.0overall

   A visual workspace with diagram and whiteboard tools plus products for org charts, process maps and cloud architecture.

   Best forteams mapping processes and org structures from live data

   Adoption data

   10M+Creately says more than 10 million people trust its platform.

   Creately, Creately home page (2026): “Trusted by 10M+ people”

   Creately has moved from a general diagram app toward connected maps of how an organization runs. One subscription covers Workspace for diagrams and whiteboards, Atlas for org charts, Process for process maps, Blueprint for cloud architecture and Compass for compliance controls, each with Basic features on any plan. The free plan gives an infinite canvas with every diagram type but caps each diagram at 45 shapes. Pro, at $8 per editor per month on monthly billing, removes that cap, adds PDF, SVG, PNG and JPEG export, private links and one connected data source refreshed daily. Business, at $149 per organization per month, adds unlimited data sources, admin roles, an audit log and priority support. Advanced features in each product require the custom Enterprise plan. Creately says more than 10 million people use it, a smaller figure than Lucid, draw.io or Miro. Teams that only need standalone flowcharts may find the product lineup more than they need.

   Strengths

   • +Pro costs $8 per editor per month on monthly billing
   • +AI tools included on every plan, including Free
   • +Separate products for org charts, process maps and cloud architecture under one subscription

   Limitations

   • −Free plan caps diagrams at 45 shapes
   • −Business is priced at $149 per organization per month
   • −Advanced features in each product need the custom-priced Enterprise plan

   SummaryCreately is the best diagramming software for teams that want diagrams fed by live data because Pro connects one data source for $8 per editor per month. Teams that just draw flowcharts can use draw.io for free.

8. 8

   Gliffy

   A diagramming app built into Atlassian Confluence for flowcharts, UML, BPMN and network diagrams.

   7.9overall

   A diagramming app built into Atlassian Confluence for flowcharts, UML, BPMN and network diagrams.

   Best forConfluence teams documenting systems

   Adoption data

   18+ millionGliffy's home page cites 18 million Confluence users alongside its product; the figure is Gliffy's own claim and is not broken out as active Gliffy users.

   Gliffy, Gliffy home page (2026): “18+ Million Confluence Users Love Gliffy”

   Gliffy is a diagram editor that lives inside Confluence pages, which suits teams whose documentation already sits there. It covers flowcharts, UML, BPMN, network and Mermaid diagrams with drag and drop editing, exports to JPEG, PNG and SVG, imports Visio and draw.io files, and includes an AI feature that generates diagrams. Permissions follow Confluence, so there is no separate access model to manage. Pricing is low: free with no time limit for up to 10 users, then $3.80 per user per month billed annually for 11 to 100 users. A Zero Egress edition, from $2.80, keeps all diagram data inside the Atlassian environment for teams with ITAR, HIPAA or GDPR requirements. The catch is that Gliffy only works in Confluence, and buying goes through Atlassian Marketplace. Gliffy's site cites 18 million Confluence users, a claim we could not tie to active Gliffy usage, so adoption is scored with caution.

   Strengths

   • +Free with no time limit for up to 10 users
   • +$3.80 per user per month for 11 to 100 users, billed annually
   • +Zero Egress edition keeps diagram data inside Atlassian, from $2.80

   Limitations

   • −Works only inside Confluence
   • −Licensing and renewals run only through Atlassian Marketplace
   • −Fewer collaboration features than standalone tools such as Lucidchart

   SummaryGliffy is the best diagramming software for Confluence teams because it is free for up to 10 users and $3.80 per user above that. Teams outside Confluence should use draw.io or Lucidchart instead.

9. 9

   Whimsical

   A workspace for flowcharts, mind maps, wireframes and docs on a shared board.

   7.2overall

   A workspace for flowcharts, mind maps, wireframes and docs on a shared board.

   Best forproduct teams pairing flowcharts with docs and wireframes

   Whimsical is a clean, fast tool for product teams that sketch flows and screens. Boards hold flowcharts, mind maps, wireframes and whiteboard content, and Docs sit beside them, so a spec and its user flow live together. AI tools generate flowcharts, mind maps and wireframes from a prompt. The free plan is mainly for evaluation: 50 board objects and 50 doc blocks per month, watermarked exports and 7 days of version history. Pro, at $10 per editor per month billed annually, removes those limits and extends history to 90 days, and Business, at $20, adds private teams, SAML SSO and SCIM. Viewers and guests are free on every plan. Whimsical lacks the large standards-based shape libraries that network and cloud diagrams often need, and it does not publish a user count, so we scored adoption low.

   Strengths

   • +Viewers are always free
   • +Voting and timer included even on Free
   • +Business adds SAML SSO and SCIM at $20 per editor

   Limitations

   • −Free plan limits you to 50 board objects per month
   • −No published user or customer count
   • −Fewer technical shape libraries than Lucidchart, Visio or draw.io

   SummaryWhimsical is the best diagramming software for product teams because Pro puts flowcharts, wireframes and docs on one board for $10 per editor with free viewers. Teams drawing detailed network or cloud diagrams should pick Lucidchart or draw.io.

10. 10

    Eraser

    An AI platform that builds architecture diagrams from prompts, code, cloud accounts and documents.

    7.1overall

    An AI platform that builds architecture diagrams from prompts, code, cloud accounts and documents.

    Best forarchitecture teams generating diagrams from code and cloud

    Adoption data

    5,000+Eraser says it has more than 5,000 customers.

    Eraser, Eraser home page (2026): “5,000+ customers”

    Eraser targets one job: architecture diagrams that stay close to the systems they describe. Its AI builds diagrams from a prompt, Terraform, a design document, Git repositories or cloud and CMDB data, then lands the result on a full visual editor for hand edits. Teams can lock in notation, colors, layout, naming rules and reference architectures so output stays consistent, and an MCP server lets AI clients such as Claude, Cursor or ChatGPT create and update diagrams. The free plan gives 3 files, 3 AI credits and unlimited guests. Business, at $45 per member per month billed annually or $60 monthly, adds 100 AI credits a month, unlimited files, one Git repo and one data source, while Business Plus is $42 per member with a 10 seat minimum and adds SAML SSO. That price is far above every other paid seat here, and Eraser is not built for org charts or general process maps. Eraser reports more than 5,000 customers.

    Strengths

    • +Generates architecture diagrams directly from code and infrastructure
    • +Free plan includes 3 files and unlimited guests
    • +Open-source agent toolkit under the MIT license

    Limitations

    • −Most expensive verified seat on this list at $45 per member per month
    • −Free plan stops at 3 files and 3 AI credits
    • −Focused on architecture, not general flowcharts or org charts

    SummaryEraser is the best diagramming software for architecture teams that want diagrams generated from code because it reads Terraform, Git repos and cloud data. At $45 per member per month, most teams will get better value from Lucidchart or draw.io.

Questions or corrections: editorial@statlyst.com · Disclosure