Stack AI vs Zep
Reviewed by MarTechRadar Research Desk. Pricing & entity snapshots verified Oct 26, 2026.
Stack AI (Web SaaS) and Zep (Cloud SaaS Platform) both compete in No-Code Marketing Workflow Automation. On pricing, Stack AI lists Custom / enterprise pricing (no free plan disclosed), whereas Zep lists $25–$375/mo · Enterprise plan (no free plan disclosed). Technically, Stack AI is rated L3 · Conditional automation with a 1.4/5.0 (Thin wrapper) moat, while Zep is rated L3 · Conditional automation with a 2.7/5.0 (Workflow-embedded) moat. Corporate profile: Stack AI (HQ United States) vs. Zep (founded 2023, HQ San Francisco, California, United States, $2.3M funding). Verified by the MarTechRadar Research Desk (Oct 15, 2026 for Stack AI; Oct 26, 2026 for Zep). At a 5-seat team baseline, Stack AI starts at Custom quote vs Zep at ~$25/mo (base).
Stack AI
Enterprise workflow automation platform enabling revenue and operations teams to build, deploy, and monitor custom multi-LLM pipelines via an intuitive.
5-User Team Cost: Custom quote (Custom / enterprise pricing) · Autonomy: L3 · Conditional automation · Moat: 1.4/5.0 (Thin wrapper)
Target fit: B2B SaaS, DTC / eCommerce, Enterprise Brands (Web SaaS)
Zep
Unified context layer and temporal knowledge graph platform giving enterprise AI agents long-term memory across conversations and business data.
5-User Team Cost: ~$25/mo (base) ($25–$375/mo · Enterprise plan) · Autonomy: L3 · Conditional automation · Moat: 2.7/5.0 (Workflow-embedded)
Target fit: B2B Marketing, Growth & Revenue Teams (Cloud SaaS Platform)
How Stack AI and Zep differ
- Pricing model: Stack AI is enterprise / quote, Zep is subscription.
- Zep publishes an entry price ($25–$375/mo · Enterprise plan); Stack AI does not (Custom / enterprise pricing).
- Moat tier: Zep is rated Workflow-embedded, Stack AI Thin wrapper.
- Delivery: Stack AI is a Web SaaS product; Zep is a Cloud SaaS Platform product.
- Headquarters: Stack AI in United States, Zep in San Francisco, California, United States.
- Audience: Stack AI targets B2B SaaS, DTC / eCommerce, Enterprise Brands; Zep targets B2B Marketing, Growth & Revenue Teams.
Computed from the fields below. Only editor-verified ratings and vendor-sourced prices are compared.
When to choose Stack AI vs Zep (and when to walk away)
Choose Stack AI if
- Target ICP & Stack Fit: You operate as B2B SaaS, DTC / eCommerce and Enterprise Brands requiring a Web SaaS deployment for Workflow Automation.
- L3 Architecture & Defensibility: Defensibility rests on enterprise data governance controls, multi-model fallback routing, and native connectors linking enterprise knowledge bases directly into asynchronous execution graphs.
- Commercial Model Fit: Your procurement budget aligns with Custom / enterprise pricing.
Walk away from Stack AI if
- Walk away if you require transparent self-serve monthly billing or your budget ceiling is under $1,000/mo (Stack AI requires sales-gated custom quoting).
- Walk away if your workflow cannot tolerate rate limiting and latency overhead: High-volume batch operations frequently hit upstream third-party model provider token ceilings, producing throughput bottlenecks when processing large-scale campaign datasets.
- Walk away if state management complexity is a deal-breaker for your team: Long-running asynchronous workflows requiring multi-step human review struggle with conversational state drift and context window truncation across extended validation loops.
Choose Zep if
- Target ICP & Stack Fit: You operate as B2B Marketing and Growth & Revenue Teams requiring a Cloud SaaS Platform deployment for Workflow Automation, with verified ecosystem connectivity for Model Context Protocol (MCP).
- L3 Architecture & Defensibility: Zep commands a strong enterprise AI memory moat through its Graphiti temporal knowledge graph engine, Context MCP Server, sub-200ms memory retrieval across chat and CRM data, SOC 2 Type II/HIPAA compliance, and $2.3M in Pre-Seed funding from Y Combinator and Engineering Capital.
- Commercial Model Fit: Your procurement budget aligns with $25–$375/mo · Enterprise plan.
Walk away from Zep if
- Walk away if your workflow requires uncapped enterprise volume on the $25–$375/mo · Enterprise plan entry plan without upgrading tiers.
- Walk away if your workflow cannot tolerate primary operational trade-off: In practical enterprise deployments, the primary trade-off is that Zep is a developer-centric context and memory infrastructure platform (starting at $125/month on the self-serve Flex plan) rather than a turnkey end-user CRM or no-code email marketing GUI.
- Walk away if functional scope boundary is a deal-breaker for your team: Zep is not built for visual ad banner creation, cold B2B contact scraping, or social media post scheduling.
Side-by-side facts
| Field | Stack AI | Zep |
|---|---|---|
| Subtrack | No-Code Marketing Workflow Automation | No-Code Marketing Workflow Automation |
| Pricing | Custom / enterprise pricing | $25–$375/mo · Enterprise plan |
| Pricing model | Enterprise / quote | Subscription |
| Published pricing tiers | Enterprise / Custom (Custom quote) | Enterprise / Custom (Custom quote) |
| Free access | No free plan disclosed | No free plan disclosed |
| Enterprise plan | Yes | Yes |
| AI autonomy level | L3 · Conditional automation | L3 · Conditional automation |
| Moat tier & score | 1.4 / 5.0 · Thin wrapper | 2.7 / 5.0 · Workflow-embedded |
| Delivery | Web SaaS | Cloud SaaS Platform |
| Audience | B2B SaaS, DTC / eCommerce, Enterprise Brands | B2B Marketing, Growth & Revenue Teams |
| Ecosystem integrations | — | Model Context Protocol (MCP) |
| Compliance & governance | — | SOC 2, HIPAA |
| Funding & backing | Undisclosed | $2.3M · Backed by Y Combinator, Engineering Capital |
| Founders | — | Daniel Chalef |
| Company size | — | 11-50 employees |
| Founded | — | 2023 |
| Headquarters | United States | San Francisco, California, United States |
| Fact-checked | MarTechRadar Research Desk, Oct 15, 2026 | MarTechRadar Research Desk, Oct 26, 2026 |
Stack AI vs Zep: TCO & constraint stress test
Test how both tools behave under your team size, monthly budget ceiling, CRM ecosystem, and governance guardrails.
Stack AI
High Deal-Risk · Constraint Mismatch- Opaque Enterprise Quoting vs. SMB/Mid-Market Budget: Stack AI does not disclose a public self-serve floor (Custom / enterprise pricing). Buyers with a $800/mo cap face high sales-qualification friction.
- Sales-Gated Contract Terms: Stack AI provides commercial licensing through custom enterprise pricing available on request via sales engagement.
- Primary Operational Bottleneck: Rate Limiting and Latency Overhead: High-volume batch operations frequently hit upstream third-party model provider token ceilings, producing throughput bottlenecks when processing large-scale campaign datasets.
Walk-Away Rule: Walk away if you require transparent self-serve monthly billing or your budget ceiling is under $1,000/mo (Stack AI requires sales-gated custom quoting).
Negotiation Lever: Demand a 30- to 60-day paid pilot opt-out clause in the Stack AI order form before signing a 12-month enterprise commitment.
Zep
Low Procurement Risk · Strong Fit- Published Self-Serve Entry Floor: Zep publishes a transparent entry point ($25–$375/mo · Enterprise plan) for initial validation before committing.
- Primary Operational Bottleneck: Deployment & Governance Considerations: Additionally, organizations requiring customer-managed encryption keys (BYOK), private VPC deployment, 1-year API audit logs, or a signed HIPAA BAA and SOC 2 Type II SLA must engage on a custom Enterprise contract (with emerging-company discounts available for VC-funded startups).
Walk-Away Rule: Walk away if your workflow requires uncapped enterprise volume on the $25–$375/mo · Enterprise plan entry plan without upgrading tiers.
Negotiation Lever: Validate exact quota thresholds (seats, credits, or API calls) included in Zep's $25–$375/mo · Enterprise plan tier before converting from monthly to annual billing.
Limitations
Stack AI
Operational considerations and platform boundaries include: Rate Limiting and Latency Overhead: High-volume batch operations frequently hit upstream third-party model provider token ceilings, producing throughput bottlenecks when processing large-scale campaign datasets.Full limitations in the Stack AI review
Zep
Operational considerations and platform boundaries include: Primary Operational Trade-Off: In practical enterprise deployments, the primary trade-off is that Zep is a developer-centric context and memory infrastructure platform (starting at $125/month on the self-serve Flex plan) rather than a turnkey end-user CRM or no-code email marketing GUI.Full limitations in the Zep review
Official vendor architectural differentiators & migration proof
To help buyers evaluate real-world switching costs, verified founders, solutions architects, and PMMs at both Stack AI and Zep can submit up to 3 evidence-backed architectural differentiators or verified customer migration case studies.
Why teams choose Stack AI over Zep
Work at Stack AI? Verify your official domain email to publish 3 technical differentiators, migration benchmarks, or a head-to-head buyer sandbox offer on this comparison page:
+ Submit Stack AI Official Differentiators & Case Study →Why teams choose Zep over Stack AI
Work at Zep? Verify your official domain email to publish 3 technical differentiators, migration benchmarks, or a head-to-head buyer sandbox offer on this comparison page:
+ Submit Zep Official Differentiators & Case Study →Pricing notes & tier schedules
Stack AI: Custom / enterprise pricing
Stack AI provides commercial licensing through custom enterprise pricing available on request via sales engagement.
- Enterprise / Custom (Custom quote, 15–50+ seats (Enterprise SLA)): Sales-negotiated annual contract for custom volume, SSO/RBAC governance, and dedicated SLA.
- Credit & Usage Burn Multiplier: Workflows on Stack AI consume metered credits or usage quotas; high-volume AI generation, batch queries, or recurring automation runs can exhaust base allocations and trigger mid-cycle top-up packs.
- Rate Limiting and Latency Overhead: High-volume batch operations frequently hit upstream third-party model provider token ceilings, producing throughput bottlenecks when processing large-scale campaign datasets.
Zep: $25–$375/mo · Enterprise plan
Self-serve Flex at $125/month (50,000 credits, then $25/10k credits), Flex Plus at $375/month (200,000 credits, then $75/40k credits), and Custom Enterprise (BYO-key/VPC, SOC 2 Type II, HIPAA BAA).
- Enterprise / Custom (Custom quote, 15–50+ seats (Enterprise SLA)): Sales-negotiated annual contract for custom volume, SSO/RBAC governance, and dedicated SLA.
- Credit & Usage Burn Multiplier: Workflows on Zep consume metered credits or usage quotas; high-volume AI generation, batch queries, or recurring automation runs can exhaust base allocations and trigger mid-cycle top-up packs.
- Primary Operational Trade-Off: In practical enterprise deployments, the primary trade-off is that Zep is a developer-centric context and memory infrastructure platform (starting at $125/month on the self-serve Flex plan) rather than a turnkey end-user CRM or no-code email marketing GUI.
Frequently asked questions: Stack AI vs Zep
How does Stack AI pricing compare to Zep in 2026?
Stack AI is listed at Custom / enterprise pricing (enterprise / quote, no free plan disclosed), whereas Zep is listed at $25–$375/mo · Enterprise plan (subscription, no free plan disclosed).
How do Stack AI and Zep compare on AI autonomy and moat depth?
On the MarTechRadar L1–L5 scale, Stack AI is rated L3 · Conditional automation with a Thin wrapper moat (1.4/5.0), while Zep is rated L3 · Conditional automation with a Workflow-embedded moat (2.7/5.0).
Which teams are Stack AI and Zep built for?
Stack AI is a Web SaaS product in No-Code Marketing Workflow Automation designed for B2B SaaS, DTC / eCommerce, Enterprise Brands. Zep is a Cloud SaaS Platform product in No-Code Marketing Workflow Automation designed for B2B Marketing, Growth & Revenue Teams.
What are the main limitations of Stack AI vs Zep?
For Stack AI: Operational considerations and platform boundaries include: Rate Limiting and Latency Overhead: High-volume batch operations frequently hit upstream third-party model provider token ceilings, producing throughput bottlenecks when processing large-scale campaign datasets. For Zep: Operational considerations and platform boundaries include: Primary Operational Trade-Off: In practical enterprise deployments, the primary trade-off is that Zep is a developer-centric context and memory infrastructure platform (starting at $125/month on the self-serve Flex plan) rather than a turnkey end-user CRM or no-code email marketing GUI.
What are the hidden TCO drivers and contract negotiation levers for Stack AI vs Zep?
For Stack AI: Credit & Usage Burn Multiplier (Workflows on Stack AI consume metered credits or usage quotas; high-volume AI generation, batch queries, or recurring automation runs can exhaust base allocations and trigger mid-cycle top-up packs.) Negotiation lever: Demand a 30- to 60-day paid pilot opt-out clause in the Stack AI order form before signing a 12-month enterprise commitment. For Zep: Credit & Usage Burn Multiplier (Workflows on Zep consume metered credits or usage quotas; high-volume AI generation, batch queries, or recurring automation runs can exhaust base allocations and trigger mid-cycle top-up packs.) Negotiation lever: Validate exact quota thresholds (seats, credits, or API calls) included in Zep's $25–$375/mo · Enterprise plan tier before converting from monthly to annual billing.
Excerpts are quoted verbatim from each fact-checked review. Last updated Oct 26, 2026.