Backplain vs ChatGPT Enterprise: what's actually different.
ChatGPT Enterprise is the full OpenAI stack at scale, with a 150-seat minimum. Backplain sits next to it: the same prompt across up to 10 frontier models, side by side, behind a patent-pending AI Firewall — for one flat $129/seat/mo, starting at 10 seats.
| ChatGPT Enterprise | Backplain Business | |
|---|---|---|
| Per seat / month | ~$60 (sales-quoted; not publicly listed — per AI Agent Square, 2026) | $129 — flat, listed |
| Annual cost (10 seats) | Not available — 150-seat minimum (~$108,000/yr at entry, derived from ~$60/seat × 150) | $15,480 |
| Minimum commitment | 150 seats, annual contract, sales-assisted (per Best Remote Tools, 2025) | 10 seats — monthly or annual |
| Model coverage | OpenAI only (GPT-5.x, o-series reasoning, legacy GPT-4 variants) | 47 models across 9 providers |
| Multi-model comparison | Single vendor, single stack | Up to 10 models side by side in one prompt |
| AI Firewall | — | Yes (patent-pending) — PII redaction before any model sees the prompt |
| Custom PII filtering | — | Yes |
| Prompt-level audit logs | Workspace-level admin logs | Every prompt, every session, from seat one |
| Hosting flexibility | OpenAI-hosted SaaS only | SaaS → BYO cloud → bare metal |
| Compliance posture | SOC 2 Type II; FedRAMP Moderate (ChatGPT Enterprise & API for FedRAMP); HIPAA BAA available on the API platform | SOC 2 Type II in progress (target Q3 2026); HIPAA BAA available on Enterprise; NIST 800-53 / 800-171 (CMMC L2 baseline) controls mapped; FedRAMP pursuing — not yet listed on the Marketplace |
| Best fit | Large orgs (150+ seats) standardized on OpenAI | Teams that want vendor-agnostic comparison and a hard PII boundary at one flat seat price |
ChatGPT Enterprise is a strong product for one specific shape of company: 150+ seats, standardized on OpenAI, willing to commit annually to a sales-quoted contract. You get the full OpenAI lineup — GPT-5.x, the o-series reasoning models, legacy GPT-4 variants — at scale with enterprise security.
Backplain isn't trying to replace it. The core workflow is the one we offer everywhere else on this site: take a single prompt and run it across up to 10 models simultaneously — GPT-5.x, Claude Sonnet/Opus, Gemini 2.5, Llama 4, Mistral, and others — then compare the answers in one view. For teams already on ChatGPT Enterprise, that turns Backplain into a second-opinion engine: draft in ChatGPT, then drop the same prompt into Backplain to see whether three frontier models from different vendors agree, disagree, or surface something the OpenAI stack missed.
The other half is the AI Firewall. Every prompt that leaves Backplain passes through a patent-pending software-layer firewall with custom PII redaction before any model — OpenAI or otherwise — sees it. Combined with prompt-level audit logs from seat one, a 10-seat starting point, and a flat $129/seat/mo with no token meter, Backplain fits cleanly alongside ChatGPT Enterprise for teams that want vendor-agnostic comparison and a hard compliance boundary — and is the right standalone choice for teams below the 150-seat threshold.
Pricing source: OpenAI does not publish ChatGPT Enterprise seat pricing. The ~$60/user/month figure is reported by AI Agent Square, ChatGPT Enterprise Review 2026: Is the $60/User Price Tag Justified?, aiagentsquare.com. The 150-seat minimum and annual contract are documented by Best Remote Tools, ChatGPT Enterprise Minimum Seats and Contract Length, bestremotetools.com (range commonly reported as $50–$80/user/month).