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Poseidon by Trident
What Poseidon by Trident is
Poseidon by Trident is an API-first marketplace platform for teams launching and scaling multi-sided businesses. It covers marketplace discovery, negotiation, seller onboarding, checkout, payouts, and operational management. The platform supports directory listings, consumer, B2B, service, booking, and digital marketplace models. Its workflows include auctions, request-for-quote and offer processes, competitive bidding, vendor management, seller onboarding, and payouts. Onboarding can include KYC, catalog ingestion, and compliance checks. Poseidon connects with Adyen, Stripe Connect, Braintree, and other payment processors for marketplace payouts. Its event-driven, headless design can be embedded with existing identity, data, and operational tools. An operator assistant can generate dashboards and answer marketplace questions within existing workflows. Operators can view GMV, vendors, orders, and take rate. Poseidon can also run as a standalone vendor, order, and commission management system. Launch costs $500 a month; Scale costs $2,500 a month.
Who it suits
Poseidon suits teams building marketplace businesses in commerce, fintech, or logistics. It is relevant to operators needing vendor workflows, marketplace payments, onboarding, and commission management.
What it does well
- Supports six marketplace models
- Includes KYC and compliance workflows
- Connects multiple payment processors
- Offers automated payouts and commission rules
- Provides GMV and take-rate reporting
What to know first
- Paid plans start at $500/month
- No free plan
- Available as an API platform
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Scale | starting at $2,500/month · All six marketplace models · multi-provider payouts and platform fee rules · advanced onboarding, KYC, and compliance workflows · priority support with implementation SLA | $2,500 a month |
| Launch | starting at $500/month · Digital, Directory, or Booking models · Stripe Connect split payouts · unified commission structure · standard dashboards and GMV reporting · email support | $500 a month |
As withtrident.com lists them, read 9 Oct 2026. The maker's own page has the final word.
Verdict
Poseidon combines marketplace workflows, onboarding controls, payment connections, and operational reporting in an API-first platform. Its two paid plans differ by supported models and payout capabilities.
Facts from Poseidon by Trident's own pages
- AI features
- The platform describes an operator assistant that can generate dashboards and answer marketplace questions within existing workflows. · withtrident.com, 9 Oct 2026
- Headless architecture
- Poseidon is API-first and event-driven, and can be embedded with a customer’s existing identity, data, and tooling. · withtrident.com, 9 Oct 2026
- Intended customers
- Trident describes Poseidon as marketplace infrastructure for teams launching and scaling marketplace businesses across commerce, fintech, and logistics. · withtrident.com, 9 Oct 2026
- Marketplace models
- The platform supports directory listings, consumer, B2B, service, booking, and digital marketplace models. · withtrident.com, 9 Oct 2026
- Marketplace tools
- Features include auctions, request-for-quote and offer workflows, competitive bidding, vendor management, seller onboarding, and payouts. · withtrident.com, 9 Oct 2026
- Operations
- The operator view reports GMV, vendors, orders, and take rate for marketplace operations. · withtrident.com, 9 Oct 2026
- Payments
- Poseidon connects to Adyen, Stripe Connect, Braintree, and additional payment processors for marketplace payouts. · withtrident.com, 9 Oct 2026
- Pricing note
- The pricing page says pricing scales with success and does not have a fixed take rate. · withtrident.com, 9 Oct 2026
- Purpose
- Poseidon is Trident’s marketplace platform for discovery, negotiation, onboarding, checkout, and payouts for multi-sided marketplaces. · withtrident.com, 9 Oct 2026
- Seller onboarding
- Seller onboarding workflows include KYC, catalog ingestion, and compliance checks. · withtrident.com, 9 Oct 2026
- Standalone use
- Poseidon can function as a standalone vendor management, order management, and commission management system. · withtrident.com, 9 Oct 2026
- Support
- The Launch plan lists email support, while the Scale plan lists priority support with an implementation SLA. · withtrident.com, 9 Oct 2026
Where Poseidon by Trident stands on Freedom251
- Online Marketplace Software#34 of 34