Iron.io
Iron.io (Bronze.io, Inc.) provides hosted serverless infrastructure — IronWorker, IronMQ, IronCache, and IronFunctions — serving developers and enterprises with scalable background job processing, message queuing, caching, and cloud-agnostic serverless runtimes.
- Company typePrivate
- Founded2010
- HeadquartersSan Francisco, United States
- Headcount11–50
- GTM typeB2B
- OfferingSoftware
What Iron.io does
Iron.io (legal entity Bronze.io, Inc.) is a privately held, US-based provider of hosted serverless infrastructure tools, founded in 2010 as SimpleWorker and rebranded in December 2011. The company operates a four-product platform: IronWorker (container-based workload processing with autoscaling and full GPU support across Ruby, PHP, Python, Java, Node.js, Go, .NET, Scala, Clojure, and Groovy), IronMQ (a Golang-native hosted message queue claiming 10x the throughput of RabbitMQ, with push/pull queues, long polling, and a RocksDB-backed v3 engine), IronCache (a memcached-compatible key-value cache), and IronFunctions (an open-source, cloud-agnostic serverless runtime supporting Kubernetes, Docker Swarm, and Mesosphere). IronMQ Enterprise extends the platform to on-premise and hybrid deployments for regulated buyers, and protocol gateways provide compatibility with AWS SQS and OpenStack Marconi.
The company runs a hybrid go-to-market combining self-serve product-led growth (free trial, monthly and annual self-service subscriptions, usage-based overage) with enterprise field sales (dedicated clusters, annual contracts, 24/7 support) and channel distribution via Heroku, Engine Yard, AppFog, and StackMob marketplaces. Customer logos span consumer brands (CNN, Twitter, Whole Foods, Bleacher Report, Hotel Tonight, Untappd), enterprise technology buyers (Google, Philips, Turner, Farmers Insurance, The Motley Fool, Zenefits, Veritone), and startups (Harry's, Counsyl, Edeva, Thrillist, Tune). Iron.io is GDPR-compliant and certified under the EU-U.S. and Swiss-U.S. Privacy Shield frameworks, and reports compliance with AWS Partner requirements.
Operationally, Iron.io is small (11–50 employees), has raised approximately $17M across five disclosed rounds between 2011 and 2016 (led by Baseline Ventures, Sapphire Ventures, and Bain Capital Ventures), acquired Appoxy in May 2013, and most recently added GPU support to IronWorker in September 2023. The current CEO is Korak Bhaduri, succeeding founder-led leadership. Revenue, ARR, and current burn rate are not publicly disclosed.
Iron.io firmographics
Firmographics- Name
- Iron.io
- Legal name
- Bronze.io, Inc.
- Website
- https://iron.io
- Company type
- Private
- Founded year
- 2010
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Iron.io (Bronze.io, Inc.) provides hosted serverless infrastructure — IronWorker, IronMQ, IronCache, and IronFunctions — serving developers and enterprises with scalable background job processing, message queuing, caching, and cloud-agnostic serverless runtimes.
- Ownership category
- akta.pro rank
Iron.io industry classification
Industry- Product category
- Cloud Infrastructure
- NAICS
- Computer Systems Design and Related Services (54151)
- SIC
- Services-Computer Programming Services (7371)
- akta.pro primary industry
- General-Purpose Compute (VMs & Bare Metal IaaS) (HDABAAAA)
- akta.pro secondary industry
- Bare Metal Provisioning & Lifecycle Automation (HDABADAJ)
Keywords
Where Iron.io is headquartered
LocationHeadquarters
- HQ city
- San Francisco
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Iron.io business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Infrastructure, Personnel, Marketing or Sales, Operations
Revenue model
- Subscription Plans: Monthly-based subscription plans billed at the start of each month. Annual contracts available for self-service shared instance plans with 12-month minimum commitment. Dedicated plans billed annually.
- Usage-based (Pay-as-you-go): Resource usage that extends beyond the plan amount is billed at pay-as-you-go rates on a usage-based basis. Customers can set limits to control spending.
- Professional/Enterprise Plans: Custom pricing for professional plans and above, including dedicated worker clusters and enterprise-grade features with negotiated terms.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | Monthly subscription plans for self-service shared instances |
| Subscription | Annual | Annual contract for self-service shared instance plans |
| Subscription | Multi-year contract | Dedicated plans for enterprise customers |
| Usage-based | Pay-as-you-go | Usage-based overage charges |
Go-to-market motion4 records
Distribution channels6 records
Marketing channels5 records
Iron.io product offering
Product offeringCore offering
Iron.io provides a hosted serverless tools platform delivering Workers-as-a-Service (IronWorker), Message Queue-as-a-Service (IronMQ), Key-Value Store-as-a-Service (IronCache), and an open-source serverless Functions platform (IronFunctions). The services enable developers and enterprises to run container-based background jobs, asynchronous message processing, caching, and event-driven functions without managing infrastructure, with built-in autoscaling, GPU support, and multi-region deployment.
Product overview
Iron.io is a hosted serverless tools platform offering four interconnected services: IronWorker (container-based workload processing with GPU support), IronMQ (Golang-based message queue 10x faster than RabbitMQ), IronFunctions (open-source cloud-agnostic serverless platform), and IronCache (memcached-compatible key-value cache). The platform provides workers-as-a-service, containers-as-a-service, messaging-queue-as-a-service, and key-value-store-as-a-service, enabling enterprises to build scalable asynchronous applications without managing infrastructure. The services are built with fanatical support and serve major brands including CNN, Twitter, and Philips.
Differentiator
Problem solved
Functional benefit
Brands
- IronFunctions: Open source serverless computing platform for any cloud - private, public, or hybrid.
Products and services
- IronWorker
Quantifiable outcome
- IronMQ handles 250M+ requests per day (2,900 messages per second)
- +3 more outcomes
Companies that use Iron.io
Customer profileNamed customers18 records
Segments3 records
Ideal customer profiles3 records
Iron.io technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration12 records
Feature8 records
Iron.io partnerships and signals
Strategic signalPartnerships
Eight partnerships are on record, tiered minor and core.
- StackMobminorIron.io joined the StackMob Marketplace, a mobile backend as a service platform, to provide background job processing and message queuing capabilities to mobile developers.
- Engine YardminorIronMQ is a preferred add-on on the Engine Yard platform, joining IronWorker. Engine Yard hosts, deploys, manages and scales Rails applications.
- AppFogminorIronWorker and IronMQ available as supported add-ons for AppFog's Platform as a Service offering, allowing AppFog customers to easily integrate Iron.io's serverless tools into their applications.
- HerokucoreSimpleWorker (now IronWorker) became a Heroku Add-on in private beta (February 2011) and reached General Availability (August 2011). IronMQ on Heroku reached General Availability (January 2012). Provides easy integration for Heroku customers.
- Citrix AcceleratorminorSimpleWorker (now IronWorker) was a finalist in the Citrix Global Challenge 2011. Hundreds of companies were vetted for the accelerator program.
- AWS (Amazon Web Services)coreIron.io is an AWS Partner. Services include IronMQ v3 endpoints on AWS US-East and EU-West regions. CNN, a major Iron.io customer, uses Iron.io on AWS infrastructure.
- DockercoreIron.io leverages Docker containers for its container-based workload platform. Docker and Iron.io logos appear together on the main website indicating close integration.
- Kubernetes/Docker Swarm/MesospherecoreIronFunctions (open source) supports Kubernetes, Docker Swarm and Mesosphere for container orchestration and deployment flexibility.
Scale indicators4 records
Recent moves7 records
Expansion highlights6 records
Iron.io competitors and assessment
Company assessmentBroad incumbents
- AWS Lambda: AWS's serverless functions service directly competes with IronFunctions/IronWorker in the same customer base (developers building event-driven apps), but is part of a much broader AWS portfolio and deeply integrated with AWS-native services.
- Amazon SQS: AWS's hosted message queue is the closest direct competitor to IronMQ, targeting identical use cases (decoupling services, async processing) with similar primitives (push/pull, long polling, message persistence). IronMQ even ships a gateway supporting SQS protocol to ease migration.
- Google Cloud Functions: Google's serverless functions product competes with IronWorker/IronFunctions for event-driven workloads and shares the same developer persona, but is bundled into Google Cloud's broader data and ML stack.
- Azure Functions: Microsoft's serverless compute service competes head-to-head with IronWorker/IronFunctions, especially for enterprise .NET workloads, and benefits from Azure's deep enterprise sales motion (the same motion Iron.io targets).
- Cloudflare Workers: Edge serverless compute platform aimed at the same developer persona building event-driven applications; broadly competes with IronWorker for background and on-demand tasks, backed by Cloudflare's larger network and stack.
Direct peers
- CloudAMQP: Managed RabbitMQ hosting provider serving the same customer persona (developers needing hosted message queuing) with overlapping feature set; Iron.io explicitly benchmarks against RabbitMQ in marketing materials.
- Heroku: PaaS platform where IronWorker/IronMQ are distributed as add-ons. Heroku competes in adjacent PaaS/managed-app territory and is both a partner and overlapping option for developers who might otherwise use Iron.io for background processing.
Emerging players
- Serverless Framework (now Serverless, Inc.): Open-source framework for building and deploying serverless applications across clouds — overlapping with IronFunctions' cloud-agnostic developer tooling story and competing for the same multi-cloud serverless workflow.
- PubNub: Real-time messaging and pub/sub platform overlapping with IronMQ's messaging focus, particularly for fan-out, alerts, and realtime use cases targeted at developers building event-driven apps.
- Redis Cloud: Managed memcached/Redis-compatible key-value caching service — directly comparable to IronCache's positioning as a fast, scalable, memcache-compatible cache for application state and inter-process communication.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights6 records
Customer concentration
Iron.io social profiles
Digital presenceIron.io compliance and trust
Trust signalCompliance3 records
Iron.io financial estimates
Financial estimateRevenue estimate
Valuation estimate
Iron.io leadership team
Management profileNumber of profiles
Profiles3 records
Iron.io funding detail
Funding detailFunding overview
Funding rounds5 records
Investors10 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Iron.io 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 Iron.io
What does Iron.io do?
Iron.io provides a hosted serverless tools platform delivering Workers-as-a-Service (IronWorker), Message Queue-as-a-Service (IronMQ), Key-Value Store-as-a-Service (IronCache), and an open-source serverless Functions platform (IronFunctions). The services enable developers and enterprises to run container-based background jobs, asynchronous message processing, caching, and event-driven functions without managing infrastructure, with built-in autoscaling, GPU support, and multi-region deployment.
Is Iron.io a public or private company?
Iron.io is a private company. It is classified as venture growth investor backed and is currently operating.
When was Iron.io founded?
Iron.io was founded in 2010. It employs 11 to 50 people.
Where is Iron.io based?
Iron.io is headquartered in San Francisco, United States, in the North America region.
How does Iron.io make money?
Three revenue lines are on record. Subscription Plans are the primary driver. The others are usage-based (Pay-as-you-go) and professional/Enterprise Plans.
Who are Iron.io's main competitors?
Broad incumbents on record are AWS Lambda, Amazon SQS, Google Cloud Functions, Azure Functions and Cloudflare Workers. Direct peers are CloudAMQP and Heroku. Emerging players are Serverless Framework (now Serverless, Inc.), PubNub and Redis Cloud.
Does Iron.io have an API?
Yes. Iron.io provides a REST-based API with OAuth2 authentication for all services (IronWorker, IronMQ, IronCache). Client libraries are available in multiple languages including Ruby, Python, PHP, Java, Node.js, Go, and .NET. The platform offers both push and pull queues for messaging, with support for long polling to reduce unnecessary requests on empty queues. Developer documentation is at dev.iron.io.
What industry is Iron.io in?
Iron.io's product category is Cloud Infrastructure. Its primary akta.pro industry code is HDABAAAA, General-Purpose Compute (VMs & Bare Metal IaaS), with a secondary code of HDABADAJ, Bare Metal Provisioning & Lifecycle Automation. Its NAICS code is 54151 and its SIC code is 7371.