Houston is home to 16 SaaS and AI products actively bought by companies on Cledara, led by SSL.com (0.01% market share). This ranking is built from real purchasing data — what companies actually pay for, not funding announcements — and updates monthly. Data as of 18 August 2026, 22:20 UTC.
| # | Product | Category | Description | Founded | Employees | Funding | 12-mo rank |
|---|---|---|---|---|---|---|---|
| 1 | SSL.com | IT & Security | SSL.com is a platform for digital document and code signing. It securely stores certificates and signing keys in FIPS-compliant hardware appliances accessible via a web app or API. eSigner supports integration with services like DocuSign and Adobe Sign, providing globally trusted signatures and long-term validation for PDF documents. | 2,004 | 11-50 employees | +300 | |
| 2 | cPanel | Engineering & DevOps | cPanel is a control panel designed for the web hosting industry. | 1,996 | 501-1,000 employees | -284 | |
| 3 | Plesk | Engineering & DevOps | Plesk is a web hosting control panel that simplifies website and server management. It offers a wide range of tools and features for managing web servers, websites, applications, email, and security settings from a centralized and user-friendly interface. Plesk aims to streamline website and server management tasks, improve efficiency, and enhance security for users. | 2,001 | 501-1,000 employees | +1,409 | |
| 4 | WHMCS | Finance & Accounting | WHMCS is a client management, billing, and support solution designed for web hosting businesses. It streamlines and automates various aspects of running a hosting business, including invoicing, provisioning, domain management, and customer support. | 2,005 | 501-1,000 employees | ||
| 5 | VisualCron | Marketing & Growth | VisualCron is a Windows automation tool that schedules tasks, integrates systems, and processes files using protocols like SFTP and SQL. | 2,006 | 51-200 employees | ||
| 6 | OptiSigns | Marketing & Growth | OptiSigns is a digital signage platform that manages content across various display types, supporting multiple file formats and real-time updates. | 2,016 | 51-200 employees | ||
| 7 | 2Chat | Collaboration & Productivity | 2Chat offers an automation platform for WhatsApp / messaging, enabling businesses to manage multi-agent chats, bots, and workflows. It allows integration via API and supports messaging automation across channels. | 2,022 | 2-10 employees | ||
| 8 | Payfunnels | Marketing & Growth | Payfunnels is a web-based application that enables businesses to accept online payments through Stripe without requiring coding skills or a website. It supports one-time charges, recurring payments, and custom payment plans. All transactions are secured via HTTPS/SSL connections. | 2,015 | 2-10 employees | ||
| 9 | ClickMagick | Marketing & Growth | ClickMagick is a web-based software tool that provides various features for digital marketers to track, optimize, and manage their online marketing campaigns. | 2,014 | |||
| 10 | ChartExpo | Data & Analytics | ChartExpo is a data visualization tool that simplifies the process of transforming data from spreadsheets into insightful charts. It enhances data security and privacy by enabling chart creation directly within familiar spreadsheet applications like Google Sheets and Microsoft Excel. | 2,014 | 51-200 employees | ||
| 11 | symplr | Legal, Risk & Compliance | symplr provides governance, risk, and compliance (GRC) and workforce management software for healthcare organizations, including credentialing, provider management, vendor & contract management, scheduling, and analytics. | 2,006 | 1,001-5,000 employees | ||
| 12 | IT DUKES | IT & Security | IT Dukes is a managed IT services provider offering IT support, cloud services, cybersecurity and telephony solutions for small and mid-size organisations. They deliver outsourced IT, helpdesk support and infrastructure management. | 2,016 | 11-50 employees | ||
| 13 | Typesense | Engineering & DevOps | 2,016 | 11-50 employees | |||
| 14 | Datawarehouse.io | Data & Analytics | 2,021 | 2-10 employees | |||
| 15 | HostGator | Engineering & DevOps | 501-1,000 employees | ||||
| 16 | Outscraper | Data & Analytics | 2,018 | 11-50 employees |
The complete list is available as <a href="/api/export/startups/united-states/houston.csv">CSV</a> or <a href="/api/export/startups/united-states/houston.json">JSON</a>.
The largest SaaS company from Houston by headcount is symplr (1,001-5,000 employees).
The newest entrant is 2Chat (founded 2022).
The oldest is cPanel (founded 1996); the newest, 2Chat (2022).
| Category | Products |
|---|---|
| Engineering & DevOps | 4 |
| Marketing & Growth | 4 |
| Data & Analytics | 3 |
| IT & Security | 2 |
| Finance & Accounting | 1 |
| Collaboration & Productivity | 1 |
| Legal, Risk & Compliance | 1 |
Houston's SaaS scene skews toward Engineering & DevOps — 4 of its 16 tracked companies build engineering & devops software.
Houston accounts for 0% of the 3,477 ranked SaaS products founded in the United States.
SSL.com, cPanel and Plesk are the most-used SaaS products founded in Houston, based on real purchasing data from companies on Cledara. Last updated 18 August 2026, 22:20 UTC.
16 SaaS and AI products founded in Houston are actively bought by companies tracked on Cledara. Aggregators list more registered startups; this ranking counts only products with real, current usage.
Plesk and SSL.com show the strongest rank gains among Houston-founded products over the last 90 days.
Most lists rank Houston startups by funding raised or valuation. This one ranks them by adoption — how many companies actually pay for each product — measured monthly from Cledara's purchasing data.