Design, review and ship better architectures
HLDForge is the collaborative platform where engineering teams draw HLD and LLD diagrams, run AI architecture reviews, and keep every decision alive from first sketch to production.
React SPA
healthyREST · gRPC
healthydomain events
healthyMicroservice · orders
Display name
Checkout Service
Component type
Microservice
Connections
Trusted by architecture teams at
- Architectures designed
- 120k+
- Engineering teams
- 38k
- Average rating
- 4.9/5
- Uptime SLA
- 99.99%
Everything you need to design systems well
One platform for the whole architecture lifecycle: capture the design, review it rigorously, collaborate in the open and govern it at scale.
Drag-and-drop HLD & LLD editor
A precision canvas with 40+ cloud-native components, smart connectors and auto-layout. Go from blank page to review-ready diagram in minutes.
ArchitectAI copilot
Generate reference architectures, explain any board, run a resilience pass and produce design docs straight from the canvas.
Real-time collaboration
Multiplayer cursors, threaded comments, mentions and version history keep architects, engineers and reviewers in sync.
Well-Architected reviews
Automated checks surface single points of failure, missing DLQs, drift from best practice and security gaps before they ship.
200+ battle-tested templates
Start from curated HLD, LLD, sequence and infrastructure patterns, or turn your own boards into reusable team templates.
Enterprise-grade governance
SSO, RBAC, audit logs, data residency and integration policies with security reviews, SOC 2 and ISO 27001 alignment.
A canvas built for architects, not drawing tools
Every primitive you need for high-level and low-level design, with the keyboard shortcuts and polish of a professional IDE.
- 40+ components across clients, services, data, messaging, security and cloud
- One-click layered auto-layout with clean orthogonal connectors
- Inline editing, status pills and health indicators on every node
client
healthyedge
healthydomain
healthystate
healthyYour always-on staff architect
Move from a prompt to a defensible architecture fast, then let the copilot keep it honest as the system evolves.
- Generate multi-region reference architectures from a sentence
- Explain, review and refactor an existing board in context
- Produce technical design docs, ADRs and export-ready summaries
Reviewed 14 components and 22 connections. Three findings worth fixing before launch:
Review together, decide faster
Replace stale screenshots in Slack with a living document that captures the decision, the discussion and the why.
- Multiplayer editing with presence and follow mode
- Threaded comments, mentions and resolve tracking
- Full version history with named snapshots and restore
REST · gRPC
healthyv1.8.2
healthyprimary
healthyShould the checkout service own retries, or push them to the queue?
Standards that scale with the org
Give every team guardrails and visibility, from a two-person startup to a regulated enterprise.
- Reusable templates, component libraries and naming policies
- Usage analytics, audit logs and per-workspace controls
- SSO, SCIM, RBAC and data residency for enterprise
42
Reviews
318
Designs
91%
Issues fixed
From blank page to review-ready in minutes
No steep learning curve, no rigid process. HLDForge fits the way your team already makes decisions.
- Step 1
Describe or pick a pattern
Prompt ArchitectAI in plain English or start from a template that already matches your stack.
- Step 2
Shape it together
Drag components, auto-layout, comment inline and iterate with your team on an infinite collaborative canvas.
- Step 3
Validate and ship
Run a resilience review, export to PNG/SVG/PDF, and share a versioned link your whole org can trust.
Start from a pattern that already works
200+ curated HLD, LLD, sequence and infrastructure templates, reviewed by practising architects and ready to apply in one click.
Payments Platform HLD
HLDReference architecture for a PCI-compliant payments platform with checkout, orchestration, PSP adapters and settlement reporting.
View templateE-commerce Platform
HLDFull web + mobile e-commerce topology: catalog, cart, checkout, search, personalization and order orchestration.
View templateIdentity & Access Platform
ARCHITECTURESSO, directory sync, MFA, token service and audit pipeline for enterprise-grade authentication.
View templateLoved by the teams who own reliability
Staff engineers, principal architects and platform leads use HLDForge to make architecture a shared, living practice.
“HLDForge replaced a tangle of whiteboards, screenshots and half-maintained Visio files. Our design reviews went from 90 minutes to 30, and the decisions are finally documented.”
“ArchitectAI caught three single points of failure in a payment flow we had already signed off. That one review paid for the whole plan.”
“The multiplayer canvas is the first diagramming tool my backend and product teams actually fight to use. Version history alone is worth it.”
“Rolling it out to 400 engineers took an afternoon. SSO, SCIM and audit logs meant security signed off without a single exception.”
“We standardised every new service on the same template. Onboarding a new engineer to a system now takes days instead of weeks.”
“The well-architected checklist is baked into our definition of done. It is the cheapest reliability investment we have made.”
Fits the tools your team already uses
Connect HLDForge to your code, docs and chat so architecture lives where the work happens.
Enterprise-grade from day one
Architecture is sensitive by nature. HLDForge is built with the controls your security team will actually approve.
Read the security overviewSimple pricing that scales with your team
Start free, upgrade when your team is ready. Every paid plan includes unlimited boards, AI credits and real-time collaboration.
Starter
$0free forever
For individuals and small teams getting their architecture under control.
- Up to 3 boards
- 1 workspace · 5 members
- Core HLD & LLD component library
- 50 ArchitectAI credits / month
Growth
Popular$12per user / mo
For product teams that design, review and ship together every week.
- Unlimited boards & workspaces
- Unlimited collaborators
- 1,000 ArchitectAI credits / user
- Real-time collaboration & comments
Enterprise
$31per user / mo
For regulated organisations with security, scale and compliance needs.
- Everything in Growth
- SAML SSO, SCIM & granular RBAC
- Audit logs & data residency
- Private cloud or self-hosted option
Questions, answered
Can't find what you need? Our team replies in under a business day.
Contact supportIs there a free plan?
Yes. The Starter plan is free forever and includes 3 boards, a 5-person workspace and 50 ArchitectAI credits per month. No credit card required.
How does ArchitectAI usage work?
Each plan includes a monthly pool of AI credits. Generation, reviews and document creation consume credits; simple edits and collaboration are always free. You can top up or upgrade at any time.
Can we self-host or use a private cloud?
Enterprise customers can deploy HLDForge in a private cloud or fully self-hosted environment, with the same collaboration and AI features, plus data residency options.
What happens to our data if we cancel?
Your boards remain exportable in open formats (JSON, PNG, SVG, PDF) for 30 days after cancellation. You can export everything before or after you leave.
Do you offer discounts for startups and education?
Yes. Early-stage startups, non-profits and educational institutions can apply for significant discounts. Contact us with a short description of your team.
Design your next system with confidence
Join 38,000 engineering teams using HLDForge to design, review and ship better architectures. Free to start, no credit card required.
SOC 2 Type II · ISO 27001 aligned · SSO on every paid plan