Code

Free to start

Operational.co

Event Tracking

Operational is an open source event tracker built for tech products and SaaS operators who need a live feed of signups, payments, webhooks, cron jobs, and errors.

• Not listed
• API unknown
• Checked Oct 4, 2026

Free plan

OPNsense

Research

OPNsense is an open-source firewall and routing platform based on FreeBSD, offering VPN, traffic shaping, IDS/IPS, and extensive plugin extensions. The project site describes OPNsense as a feature-rich platform for network protection with community downloads and commercial support options.

• Free
• API unknown
• Checked Oct 4, 2026

Free plan

OptaPlanner

Code

OptaPlanner is an Apache KIE constraint-satisfaction engine for planning and scheduling problems such as routing, staffing, and resource allocation. The optaplanner.org domain now redirects to the Apache KIE incubating site, which lists OptaPlanner alongside Drools, jBPM, and Kogito as open-source business automation components.

• Free
• API unknown
• Checked Oct 4, 2026

Free plan

OrcaQ

Database

OrcaQ is an open source next-generation database client for queries, schema design, local-first security, and AI-assisted analysis in one workspace.

• Free
• API available
• Checked Oct 4, 2026

Free to start

Orcyx

AI developer workflows

Orcyx coordinates AI agents to make software changes that developers review before accepting.

• Not listed
• API unknown
• Checked Oct 10, 2026

Free trial

Organization

Code

Phase Two Organizations is a Keycloak extension for multi-tenant B2B identity, adding organization-aware invitations, authorization, and self-management on top of managed Keycloak hosting. The product page targets SaaS vendors that need per-customer orgs, SSO, and customizable auth flows without rebuilding IAM primitives.

• $149.00/mo · starting plan
• API available
• Checked Oct 4, 2026

Free tier unknown

Origin AI

Code

Origin AI markets itself as the world's first AI product team for generating and deploying custom enterprise software without a traditional development team. The public site positions Origin as a way to turn product ideas into shipped software through AI-driven tooling rather than staffing a full engineering org.

• Not listed
• API unknown
• Checked Oct 4, 2026

Free plan

Orkas

Assistant

Orkas lets solo founders and small teams direct a roster of AI agents by chat to produce research, documents, slides, images, videos, websites, and operational workflows. The desktop app ships free and open source for Mac and Windows, with optional membership credits for managed frontier models, collaboration, and cloud sync.

• $11.99/mo · starting plan
• API available
• Checked Oct 4, 2026

Free tier unknown

ORO AI

Research

ORO AI hosts an open Bittensor arena where shopping agents compete on fresh tasks each day. Independent validators sandbox every run, verify trajectories, and pay daily rewards to the top-performing agent as builders iterate on real ecommerce scenarios.

• Not listed
• API unknown
• Checked Oct 4, 2026

Free to start

Orq

Code

Orq.ai is a sovereign AI gateway and platform that routes traffic to hundreds of LLMs and MCP tools through one API with governance, observability, and cost controls. The vendor emphasizes EU deployment, guardrails, and pay-as-you-go platform metering separate from model provider charges.

• Not listed
• API available
• Checked Oct 4, 2026

Free to start

Orquesta AI Prompts

Code

Orquesta AI Prompts now lives under Orq.ai as part of its sovereign AI gateway and studio platform for managing prompts, agents, and LLM workflows. The Orq site covers experimentation, evaluation, knowledge bases, and production deployment rather than a separate Orquesta domain.

• Not listed
• API available
• Checked Oct 4, 2026

Free plan

Ory

Security

Ory provides identity, authentication, authorization, and OAuth2/OIDC services through Ory Network and related open-source projects such as Kratos, Hydra, and Keto. The commercial site targets CIAM, B2B IAM, fine-grained permissions, passkeys, and enterprise SSO for applications that need scalable, API-first identity infrastructure.

• $770.00/mo · starting plan
• API available
• Checked Oct 4, 2026

Free tier unknown

OS3

Code

OS3 designs and builds HALE 1.0, a US-made bimanual mobile robot trained with video demonstrations. It deploys the platform in hospitality laundry today while selling developer units and partner programs for other semi-humanoid applications.

• Not listed
• API unknown
• Checked Oct 4, 2026

Free plan

Osaurus

Assistant

Osaurus runs powerful AI agents locally on your Mac with a harness you control, supporting local or frontier models while keeping data on device. The core app is free and MIT licensed; Workspaces adds shared agents and a team credit pool for collaboration.

• $20.00/mo · starting plan
• API unknown
• Checked Oct 4, 2026

Free tier unknown

Osseus

Research

Osseus builds medical superintelligence starting with medical and biological datasets, evaluations, and reinforcement learning environments for frontier labs. The company offers off-the-shelf and custom datasets plus interactive environments where models gather evidence and use clinical or scientific tools with safety feedback.

• Not listed
• API unknown
• Checked Oct 4, 2026

Free plan

OSSN

Social Network

Open Source Social Network (OSSN) is a free PHP social network script for building self-hosted community sites with profiles, timelines, groups, messaging, notifications, and media sharing. The project emphasizes data sovereignty, REST APIs, themes and components, and optional commercial hosting or marketplace add-ons.

• Free
• API available
• Checked Oct 4, 2026

Free tier unknown

Otera

Code

Otera, formerly DeepOpinion, is an enterprise agentic automation platform that runs regulated back-office processes end to end in banking, insurance, and global business services. The site positions the product around autonomous operations, deep integrations, and outcome-based commercial engagements rather than seat-based SaaS.

• Not listed
• API unknown
• Checked Oct 4, 2026

Free tier unknown

Otherhalf

Code

Otherhalf offers immersive AI companion characters with distinct personalities and adaptive conversations, marketed for download on mobile and desktop clients. The site showcases individual companions, blogs about conversational AI, and community updates from Azimov, Inc.

• Not listed
• API unknown
• Checked Oct 4, 2026

Free tier unknown

Outhad

Research

Outhad AI is an applied intelligence research lab building real-time decision systems and agent orchestration products. Public offerings include Convertive for ecommerce session activation and Outhad Studio for composing multi-agent workflows without rebuilding plumbing each time.

• Not listed
• API unknown
• Checked Oct 4, 2026

No free plan

Outlier AI

Assistant

Outlier AI connects subject-matter experts—coders, linguists, STEM graduates, and more—to freelance projects that improve frontier AI models. Experts create prompts, rubrics, and ratings remotely without needing prior AI industry experience.

• Not listed
• API unknown
• Checked Oct 4, 2026

Free to start

Outline Server

VPN

Outline helps people run their own VPN to access the open internet more safely. It combines the Outline Manager desktop app to deploy servers on chosen cloud providers and the Outline Client apps to connect with access keys, using open source, audited technology designed to resist common blocking techniques.

• Not listed
• API available
• Checked Oct 4, 2026

Free tier unknown

Outpost

Assistant

Outpost is an AI-native services collective that assigns three senior product professionals—engineering and design—to ship client requests in days. The model combines human experts with AI workflows for web apps, campaigns, and product builds under a fixed monthly retainer.

• $7,500.00/mo · starting plan
• API unknown
• Checked Oct 4, 2026

Free tier unknown

Outship

Code

Outship is a recruiting platform that records and analyzes how engineering candidates use real coding agents such as Claude Code and Codex during take-home or interview tasks. Hiring teams import a GitHub task repo, send an invite link, and review every agent decision instead of only the final diff.

• Not listed
• API unknown
• Checked Oct 4, 2026

Free tier unknown

outsystems.com

Code

OutSystems is an enterprise low-code and AI development platform for building governed web and mobile applications plus custom agents. The homepage positions OutSystems as combining a low-code foundation with AI-driven software development, full SDLC governance, and agentic systems for large organizations.

• Not listed
• API unknown
• Checked Oct 4, 2026

Plan facts carry individual sources and check dates. Unknown values are excluded from required filters.