FusionAuth
FusionAuth is a Customer Identity and Access Management (CIAM) platform offering authentication, fine-grained authorization, and user management for developers and enterprise customers. The self-hostable, API-first platform is deployed across fintech, healthcare, gaming, government, and retail.
- Company typePrivate
- Founded2018
- HeadquartersBroomfield, United States
- Headcount51–100
- GTM typeB2B
- OfferingSoftware
What FusionAuth does
FusionAuth is a privately held Customer Identity and Access Management (CIAM) company founded in 2018 by Brian Pontarelli and headquartered in Westminster, Colorado. The company provides authentication, authorization, and user-management capabilities for customer-facing applications, targeting software developers, engineering teams, and enterprise organizations across verticals including healthcare, fintech, gaming, retail, energy, and government. Its core differentiator is deploy-anywhere flexibility: customers can run the platform self-hosted, on a dedicated cloud (FusionAuth Cloud), hybrid, or fully air-gapped, with predictable pricing that does not penalize user growth.
The core product is a Java-based, API-first platform built on PostgreSQL with Elasticsearch for search, offering advanced security features such as Advanced Threat Detection, Multi-Factor Authentication, Passkeys/WebAuthn, Breached Password Detection, and Machine-to-Machine authentication. In November 2025, FusionAuth acquired Permify and added Fine-Grained Authorization (FGA) — a graph-based permission resolution engine with sub-10ms response times and a domain-specific language for modeling — creating a self-hostable platform that unifies authentication and authorization. The November 2025 launch of the FusionAuth MCP Server extends the platform to AI-agent identity, allowing assistants such as Claude to interact with a FusionAuth instance via natural language. Certifications include SOC 2 Type 2, ISO 27001 (achieved August 2025), GDPR, CCPA, COPPA, and the EU-U.S. Data Privacy Framework.
FusionAuth operates a freemium go-to-market: a Free Community Edition drives developer adoption via self-serve download, AWS/GCP/DigitalOcean marketplace listings, and a documentation-heavy developer experience, while quote-based paid plans and enterprise field sales capture larger deployments. The company received a $65 million strategic investment from Updata Partners in November 2023 after bootstrapping to profitability, reportedly achieved 100% revenue growth at the start of 2025, and has appeared on the Inc. 5000 list multiple times (354% three-year growth in 2023, #1269 in 2024). Leadership was refreshed in July 2025 with Brian Bell appointed CEO and founder Pontarelli transitioning to CTO, alongside CMO Dayna Rothman, Head of Product David Hayes, and CRO Mark van Oppen.
FusionAuth firmographics
Firmographics- Name
- FusionAuth
- Legal name
- FusionAuth
- Website
- https://fusionauth.io
- Company type
- Private
- Founded year
- 2018
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- FusionAuth is a Customer Identity and Access Management (CIAM) platform offering authentication, fine-grained authorization, and user management for developers and enterprise customers. The self-hostable, API-first platform is deployed across fintech, healthcare, gaming, government, and retail.
- Ownership category
- akta.pro rank
FusionAuth industry classification
Industry- Product category
- Identity and Access Management
- NAICS
- Computer Systems Design and Related Services (54151), Computer Systems Design and Related Services (5415), Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (5182), Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518)
- SIC
- Services-Computer Programming, Data Processing, Etc. (7370), Services-Computer Integrated Systems Design (7373)
- akta.pro primary industry
- Customer Identity & Access Management (CIAM) (BPAMAEAA)
- akta.pro secondary industries
- Single Sign-On (SSO) & Federation (BPAMAEAF), Authentication (MFA/Passwordless/Biometrics) Platforms (BPAMAEAE), Customer Identity & Access Management (CIAM) (HDADAAAD), Single Sign-On (SSO) & Federation (SAML/OIDC, Identity Providers) (HDAEAJAB), Customer Identity & Access Management (CIAM) (HDAEAJAF)
Keywords
Where FusionAuth is headquartered
LocationHeadquarters
- HQ city
- Broomfield
- HQ country
- United States
- HQ region
- North America
Offices3 records
Markets served
FusionAuth business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Marketing or Sales, Infrastructure, Operations
Revenue model
- Subscription Licensing: FusionAuth generates revenue primarily through software licensing subscriptions. The platform offers a Free Community Edition with basic features, alongside paid tiers providing enterprise capabilities including advanced security features, dedicated support, SLA guarantees, and deployment flexibility for cloud, self-hosted, or hybrid configurations.
- Enterprise Support and Services: Additional revenue from enterprise support packages, professional services, and custom deployment assistance for large organizations requiring dedicated infrastructure and SLA commitments.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Others | Free Community Edition - Self-hosted authentication for developers and small teams |
| Subscription | Annual | Paid Plans - Enterprise-grade features with support and SLA |
Go-to-market motion4 records
Distribution channels5 records
Marketing channels8 records
FusionAuth product offering
Product offeringCore offering
FusionAuth provides a unified Customer Identity and Access Management (CIAM) platform that delivers authentication, fine-grained authorization, user management, and security features (MFA, passkeys, SSO, threat detection). The platform is deployable as self-hosted, dedicated cloud, on-premises, hybrid, or air-gapped and is API-first, targeting software developers and enterprise organizations that need complete control over identity infrastructure without vendor lock-in.
Product overview
FusionAuth is a unified Customer Identity and Access Management (CIAM) platform that provides authentication, fine-grained authorization, and user management capabilities. The platform offers a single integrated system (not a patchwork of features) deployable as self-hosted, dedicated cloud, on-premises, hybrid, or air-gapped. The core FusionAuth CIAM Platform is augmented by FusionAuth FGA (Fine-Grained Authorization), acquired from Permify in November 2025, which provides a graph-based permission resolution engine. Additional components include the FusionAuth MCP Server for AI agent identity management. Key security features include Advanced Threat Detection (AI-powered anomaly detection), Multi-Factor Authentication, Passkeys, and Breached Password Detection. The platform supports extensive SDKs for JavaScript/TypeScript, Python, Java, Go, Ruby, PHP, .NET, Flutter, iOS, and Android development.
Differentiator
Problem solved
Functional benefit
Brands
- FusionAuth Cloud: Cloud-hosted deployment option for FusionAuth's CIAM platform
- FusionAuth FGA By Permify
Products and services
- FusionAuth CIAM Platform Unified Customer Identity and Access Management platform providing authentication, authorization, user management, and security features deployable as self-hosted, dedicated cloud, or hybrid for software developers and enterprise organizations.
- FusionAuth Cloud Cloud-hosted deployment option of the FusionAuth CIAM platform providing managed infrastructure with unlimited custom domains, dedicated deployments, predictable performance, and controlled upgrades.
- FusionAuth FGA (by Permify) Fine-grained authorization engine featuring a domain-specific language for permission modeling, graph-based permission resolution engine with sub-10ms response times, and real-time data synchronization. Processes 4.3 billion authorization checks per day.
- FusionAuth MCP Server Model Context Protocol server enabling AI assistants like Claude to interact directly with a FusionAuth instance through natural language commands for authentication and authorization management.
- FusionAuth SDKs Software development kits available for JavaScript/TypeScript (React, Angular, Vue, Node.js), Python, Java, Go, Ruby, PHP, .NET, Flutter, iOS (Swift), and Android (Kotlin) for integrating FusionAuth into applications.
- FusionAuth CLI Command-line interface for managing FusionAuth instances, automating operational tasks including theme management, email templates, and test user generation.
Quantifiable outcome
- 59% performance improvement and $50K+ savings for DataStax switching from previous auth solution
- +5 more outcomes
Companies that use FusionAuth
Customer profileNamed customers20 records
Segments7 records
Ideal customer profiles3 records
FusionAuth technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration13 records
AI capability5 records
Feature9 records
FusionAuth partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered core and secondary.
- Permify (Acquired)corePermify, an open-source authorization platform founded in 2022, was acquired by FusionAuth in November 2025. Permify processed 4.3 billion authorization checks per day across 40+ production deployments with 1.2M+ downloads. This acquisition created the first fully self-hostable platform unifying authentication and authorization.
- AWScoreAWS Partner with Qualified Software badge. FusionAuth is available in AWS Marketplace and certified for deployment on AWS infrastructure. Partnership enables customers to deploy on AWS with seamless integration and billing.
- Google CloudcoreFusionAuth Partner Program connects with Google Cloud to enhance authentication solutions. Customers deploy FusionAuth on Google Cloud Platform with case studies like Bilt serving millions of users.
- DigitalOceansecondaryDigitalOcean Marketplace listing enables one-click deployment of FusionAuth on DigitalOcean infrastructure with streamlined billing integration.
Scale indicators9 records
Recent moves6 records
Expansion highlights7 records
FusionAuth competitors and assessment
Company assessmentDirect peers
- Auth0 (Okta): Auth0 is the developer-focused CIAM platform most often compared directly to FusionAuth. FusionAuth explicitly positions against Auth0 on self-hostability, predictable pricing, and unlimited IdPs, and WeRoad is named as a customer that migrated from Auth0.
- Keycloak: Keycloak is the leading open-source self-hostable identity provider, backed by Red Hat and CNCF. It competes with FusionAuth on the same self-hostable, developer-driven axis, though Keycloak is community-driven and FusionAuth offers commercial support and SaaS deployment.
- Stytch: Stytch is a developer-focused authentication platform offering passwordless, MFA, and B2B authentication as a service. It targets a similar developer-first buyer persona as FusionAuth but is SaaS-only and optimized for drop-in integration rather than self-hosting.
- Clerk: Clerk is a developer-first authentication and user management platform focused on modern web stacks like React and Next.js. It overlaps with FusionAuth's PLG motion and small-to-mid-market developer audience, but delivers as a hosted SaaS without self-hosting.
- WorkOS: WorkOS provides enterprise authentication features (SSO, SCIM, directory sync) targeted at B2B SaaS developers. It competes with FusionAuth's enterprise SSO and Organizations features but is SaaS-only and built specifically for B2B rather than B2C identity.
- Ory: Ory offers an open-source identity and authorization stack (Ory Kratos, Hydra, Oathkeeper) deployable in any environment. Like FusionAuth, Ory targets developers who want full control of identity infrastructure with open-source components, though Ory is more developer-assembly-oriented while FusionAuth offers a single integrated platform.
Broad incumbents
- Okta: Okta is the largest identity and access management platform serving workforce and customer identity through a multi-tenant SaaS architecture. FusionAuth competes for CIAM workloads with Okta's Customer Identity Cloud (formerly Auth0) but does not match Okta's enterprise breadth or bundled workforce identity offering.
- Amazon Cognito: Amazon Cognito is the AWS-native CIAM service bundled into the AWS ecosystem. As an AWS Partner, FusionAuth co-sells alongside Cognito but must compete against it for developers already standardized on AWS, particularly when buyers want single-vendor billing.
- Microsoft Entra External ID: Microsoft Entra External ID (formerly Azure AD B2C) is Microsoft's enterprise CIAM offering integrated with the Entra identity platform. It competes with FusionAuth for Microsoft-centric enterprises, though customers seeking data sovereignty or self-hosting frequently choose FusionAuth instead.
Emerging players
- Descope: Descope is an emerging drag-and-drop CIAM platform targeting developers building customer authentication flows. It overlaps with FusionAuth's developer-first positioning and PLG motion but does not offer self-hosted deployment, making it complementary rather than a direct self-host substitute.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks6 records
Key highlights7 records
Customer concentration
FusionAuth social profiles
Digital presenceFusionAuth compliance and trust
Trust signalCompliance7 records
FusionAuth financial estimates
Financial estimateRevenue estimate
Valuation estimate
FusionAuth leadership team
Management profileNumber of profiles
Profiles5 records
FusionAuth subsidiaries and ownership
Company hierarchySubsidiaries1 record
FusionAuth funding detail
Funding detailFunding overview
Funding rounds1 record
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
FusionAuth M&A and investment
M&A and investmentM&A1 record
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about FusionAuth
What does FusionAuth do?
FusionAuth provides a unified Customer Identity and Access Management (CIAM) platform that delivers authentication, fine-grained authorization, user management, and security features (MFA, passkeys, SSO, threat detection). The platform is deployable as self-hosted, dedicated cloud, on-premises, hybrid, or air-gapped and is API-first, targeting software developers and enterprise organizations that need complete control over identity infrastructure without vendor lock-in.
Is FusionAuth a public or private company?
FusionAuth is a private company. It is classified as venture growth investor backed and is currently operating.
When was FusionAuth founded?
FusionAuth was founded in 2018. It employs 51 to 100 people.
Where is FusionAuth based?
FusionAuth is headquartered in Broomfield, United States, in the North America region.
How does FusionAuth make money?
Two revenue lines are on record. Subscription Licensing is the primary driver. The others are enterprise Support and Services.
Who are FusionAuth's main competitors?
Direct peers on record are Auth0 (Okta), Keycloak, Stytch, Clerk, WorkOS and Ory. Broad incumbents are Okta, Amazon Cognito and Microsoft Entra External ID. Descope is listed as an emerging player.
Does FusionAuth have an API?
Yes. Every identity capability is available via API and built to integrate into your product, pipelines, and workflows. FusionAuth provides REST APIs for authentication, authorization, user management, and administrative functions. The platform is API-driven by design, supporting both human users and machine-to-machine authentication scenarios. Developer documentation is at fusionauth.io/docs/apis.
What industry is FusionAuth in?
FusionAuth's product category is Identity and Access Management. Its primary akta.pro industry code is BPAMAEAA, Customer Identity & Access Management (CIAM), with a secondary code of BPAMAEAF, Single Sign-On (SSO) & Federation. Its NAICS code is 54151 and its SIC code is 7370.