Companies Using CustomGPT

CustomGPT is one of the smaller platforms in our AI Chatbots & Assistants category, but its growth trajectory makes it worth watching. As of our March 2026 crawl. We track 142 domains running CustomGPT's embeddable chatbot widget, with 133 enriched company profiles matched to LinkedIn data. The numbers are modest compared to category leaders, but the adoption curve and customer profile tell an interesting story about where no-code AI agent platforms are headed.

Growth Trajectory

CustomGPT went from 2 detected domains in October 2023 to 145 active domains by July 2025. That's not a linear climb -- the platform sat at 3-5 domains for most of 2024, then jumped from 18 to 123 domains in a single month (May 2025). That kind of spike typically signals either a major product launch, a partnership driving adoption, or a viral marketing campaign. Only 5 domains have dropped the platform since launch, which puts the retention rate at roughly 97%.

Sales Signal: The May 2025 growth spike suggests CustomGPT is entering a new adoption phase. Companies deploying the platform now are early adopters in an emerging category. Target them within 30 days of detection with complementary knowledge management or content optimization tools.

"A 97% retention rate on a new AI platform tells you the product solves a real problem. Companies deploy CustomGPT and keep it running -- that's sticky adoption, not a trial-and-forget pattern." -- Mehmet Suleyman, CEO at TechnologyChecker.io

Customer Profile

CustomGPT's user base is dominated by micro-businesses (58% with 1-10 employees), with another 25.2% in the 11-50 range. Together, companies under 50 employees make up 83% of the platform's users. Enterprise adoption is minimal: just 1 company with 10,001+ employees (Chicago Public Schools) and 2 in the 1,001-5,000 range. The company age distribution leans young -- 38.9% founded in the 2010s and 18.9% in the 2020s -- but 8.4% are pre-1960 organizations, likely legacy institutions modernizing their support operations.

Sales Signal: The 83% concentration under 50 employees means decision-makers are founders and small leadership teams, not procurement committees. Expect short sales cycles and direct outreach to work better than enterprise-style nurture campaigns.

Industry and Geographic Concentration

No single industry exceeds 6% of CustomGPT's user base. Wellness and Fitness Services leads at 5.5%, followed by Technology (4.7%), Financial Services (4.7%), and Retail (4.7%). Education, Nonprofits, and Professional Services all show similar adoption levels. This flat distribution signals a horizontal platform that serves any business with proprietary content to transform into a chatbot. Geographically, the United States accounts for 55.2% of enriched companies, with the UK second at 8.5% and Canada, Switzerland, and Netherlands each around 2-3%.

Sales Signal: The fragmented industry distribution means CustomGPT users don't cluster in one vertical. Sales teams should focus on the common denominator: businesses with accumulated proprietary content (knowledge bases, support docs, course materials) rather than targeting specific industries.

Migration Patterns

Migration data is thin, as expected for a platform this early. CustomGPT gained 3 customers from generic Artificial Intelligence tools and lost 3 to the same category -- a neutral flow. There's no clear pattern of companies switching from established chatbot vendors like Intercom or Tidio. CustomGPT isn't displacing existing solutions yet. It's either creating new demand from businesses that didn't previously have AI chatbots, or capturing users still experimenting across multiple platforms.

Sales Signal: The neutral migration flow means these companies are new to AI chatbots, not switching from competitors. They may need education-first selling: onboarding support, ROI frameworks, and use case examples rather than feature comparisons.

"When migration data shows near-zero switching, it usually means the tool is creating a new category rather than stealing share. CustomGPT is building the market, not just competing in it." -- Mehmet Suleyman, CEO at TechnologyChecker.io

Technology Ecosystem

CustomGPT users run mature web stacks despite being small businesses. CDN adoption at 99.25%, SSL by default at 97%, and mobile-friendly design at 97.7% show these aren't tech-averse organizations. Google Tag Manager (88.7%) and Google Analytics (87.2%) dominate analytics. Facebook (86.5%) and LinkedIn (63.9%) lead social integrations. Security tooling is also strong: 88% use SPF, 81.2% implement US Privacy User Signal Mechanism, and 70.7% have DMARC configured. The infrastructure split between Cloudflare (48.1%) and other providers shows typical cloud-native deployment patterns.

Sales Signal: The 63.9% LinkedIn overlap tells you these are B2B-oriented businesses running professional outreach campaigns alongside their AI chatbot deployments. Cross-sell CRM, lead nurture, and sales enablement tools to this audience.

G2 Review Signals

G2 reviews for CustomGPT are sparse (3 total mentions), which is typical for emerging AI tools. Users praise ease of understanding (1 mention) in uploading training materials and ease of use (1 mention) for the no-code setup. The sole criticism centers on communication issues (1 mention) -- specifically that the platform fails to retain past conversations. While the review volume is too low to draw firm conclusions, the ease-of-use signal aligns with our technographic data showing these are small, non-technical teams deploying AI agents without developer resources. As the platform scales, watch for feedback about response accuracy and enterprise-grade features like SSO, audit logs, and custom model fine-tuning.

Sales Signal: The thin G2 review base means prospecting teams should lead with case studies rather than review scores. Reference MIT's ChatMTC and GEMA's 248,000+ resolved queries as proof points.

Key Takeaways

1. CustomGPT is a market creator, not a market taker. The near-zero migration data and explosive May 2025 growth suggest it's building new demand for no-code AI agents rather than displacing established chatbot vendors.

2. Micro-businesses are the core audience. 83% of users have fewer than 50 employees. This drives short sales cycles but limits deal sizes unless the platform expands upmarket.

3. 97% retention validates product-market fit. Only 5 domains have dropped CustomGPT since launch. Once deployed, it stays deployed.

4. The US dominates at 55%, but Europe shows early signals. UK (8.5%), Switzerland, and Netherlands adoption suggests potential for localized go-to-market campaigns.

5. Content-first businesses are the target. The horizontal industry spread means the common thread isn't vertical -- it's businesses that have accumulated proprietary knowledge and want to make it accessible through conversational AI.

Sales Applications

Outreach Template: "I noticed your team recently deployed a CustomGPT chatbot [via TechnologyChecker.io detection]. Companies that invest in AI-powered knowledge delivery typically also evaluate [your product category] to [specific benefit]. We work with [X] similar organizations. Worth a quick call?"

Targeting Strategy: Focus on the 33 companies in the 11-50 employee segment in Technology, Financial Services, and Education verticals. These organizations have enough content to benefit from AI agents and enough budget to buy complementary tools -- but they're small enough for direct founder outreach.

Competitive Angle: When positioning against CustomGPT alternatives like Aminos.AI (544 domains) or Fastbots AI (498 domains), emphasize depth of customization, enterprise security features, or industry-specific training capabilities that generic AI chatbot builders don't offer.

Our database tracks 133 enriched companies using CustomGPT across 142 total domains. For the complete customer list with company details, explore the CustomGPT technology page on TechnologyChecker.io.