Iron.io

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.

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

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

• Serverless computing platform
• Message queue service
• Container workload processing
• Key-value cache store
• Background job processing

Headquarters

HQ city

San Francisco

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

Technology or R&D, Infrastructure, Personnel, Marketing or Sales, Operations

Revenue model

1. 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.
2. 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.
3. Professional/Enterprise Plans: Custom pricing for professional plans and above, including dedicated worker clusters and enterprise-grade features with negotiated terms.

Pricing tiers

Go-to-market motion4 records

Distribution channels6 records

Marketing channels5 records

Core 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

Named customers18 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration12 records

Feature8 records

Partnerships

Eight partnerships are on record, tiered minor and core.

• StackMobminorChannel Partner/ Reseller/ Distributor · 13 November 2012Iron.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 YardminorChannel Partner/ Reseller/ Distributor · 2 August 2012IronMQ is a preferred add-on on the Engine Yard platform, joining IronWorker. Engine Yard hosts, deploys, manages and scales Rails applications.
• AppFogminorChannel Partner/ Reseller/ Distributor · 8 February 2012IronWorker 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.
• HerokucoreChannel Partner/ Reseller/ Distributor · 11 August 2011SimpleWorker (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 AcceleratorminorOthers · 1 January 2011SimpleWorker (now IronWorker) was a finalist in the Citrix Global Challenge 2011. Hundreds of companies were vetted for the accelerator program.
• AWS (Amazon Web Services)coreTechnology or IntegrationIron.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.
• DockercoreTechnology or IntegrationIron.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/MesospherecoreTechnology or IntegrationIronFunctions (open source) supports Kubernetes, Docker Swarm and Mesosphere for container orchestration and deployment flexibility.

Scale indicators4 records

Recent moves7 records

Expansion highlights6 records

Broad 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

• Xx.com/getiron
• GitHubgithub.com/iron-io
• Facebookfacebook.com/getiron
• LinkedInlinkedin.com/company/iron-io

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds5 records

Investors10 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A1 record

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Iron.io