AI Chatbots & Autonomous Agents
4.1/5.0
VerifiedContact SalesLast technical review:
Markdown for AI (.md)

Turnstone

Persistent AI agents running on top of your existing AI subscriptions

Pricing

Contact

Contact Sales
Score

4.1/5

Last technical review
2026-11-06
Available plansVisit website (opens in a new tab)

Technical Overview

Turnstone is a macOS application for managing persistent AI agents with shared memory. It operates by leveraging your current subscriptions for models like Claude, ChatGPT, Gemini, and Grok. The architecture uses a supervisory agent to delegate tasks to specialized agents, each capable of learning specific user workflows. It supports third-party AI providers via API or subscription keys.

Analyst Evaluation: Pros and Limitations

Verified Advantages

  • Multi-model support via existing AI subscriptions.
  • Agent-based architecture with persistent memory.
  • Task delegation capabilities across specialized agents.

Technical Considerations

  • Currently exclusive to the macOS platform.
  • Requires external AI service dependencies.

Technical Capabilities & Features

2/7
Included:REST & GraphQL API
Not available:SSO / SAML Authentication
Not available:Self-Hosted Option
Included:Full Data Export
Not available:Role-Based Access Control (RBAC)
Not available:Custom Domains & SSL
Not available:Immutable Audit Logs
Scorecard
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Technical Scorecard: Turnstone

78/100
DX & Tech Documentation
Excellent
80/100
Pricing Fairness
Favorable
70/100
Security & Governance
Favorable
65/100
Data Portability & Sovereignty
Excellent
85/100
Performance & Reliability
Excellent
90/100

Time to Value & Fit by Segment: Turnstone

Estimated Time-to-Value1 - 7 days (Agile)

Standard sprint integration without complex external dependencies.

Learning CurveModerate (Standard)

Requires consulting technical documentation and basic credentials setup.

Fit Index by Organization Size

Startup & Agile Teams1 to 50 members
80%
Mid-Market & Scaleup50 to 500 members
50%
Corporate Enterprise500+ members
20%
Pricing & TCO
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Pricing

Contact Sales/mo

Model: CONTACT.

Get Turnstone (opens in a new tab)

Billing Risks & Hidden Clauses: Turnstone

Free Tier Limits:

No permanent free tier found.

Total Cost of Ownership (TCO) Projection: TurnstoneCONTACT
Deterministic cost estimation at 12 and 36 months based on team size, including SSO tax premiums and annual prepay discounts.
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Indie / Solo (1 active user)

Solo developer or independent technical founder.

Base Monthly Cost
$12/month
1 active user
12-Month Investment
$122/year
Includes ~15% savings via annual billing
3-Year TCO Projection (36m)
$366total
Consolidated software licensing expenditure

Estimated Self-Hosted VPS + DevOps Cost

Break-Even Point: Profitable starting at 3 active users

Calculated infrastructure: VPS 1 vCPU / 2GB RAM (~$5) + 0.5h DevOps/mes ($20)

Annual VPS + DevOps Cost$300/year
Differential vs SaaS LicensingSaaS is $178/year
Startup (10 active users)

Agile engineering team in validation and early traction stage.

Base Monthly Cost
$120/month
10 active users
12-Month Investment
$1,224/year
Includes ~15% savings via annual billing
3-Year TCO Projection (36m)
$3,672total
Consolidated software licensing expenditure

Estimated Self-Hosted VPS + DevOps Cost

Break-Even Point: Profitable starting at 10 active users

Calculated infrastructure: VPS 2 vCPU / 8GB RAM (~$15) + 2h DevOps/mes ($80)

Annual VPS + DevOps Cost$1,140/year
Differential vs SaaS LicensingSavings of $84/year
Growth (25 active users)

Scaling company with team governance and granular access control requirements.

Base Monthly Cost
$300/month
25 active users
12-Month Investment
$3,060/year
Includes ~15% savings via annual billing
3-Year TCO Projection (36m)
$9,180total
Consolidated software licensing expenditure

Estimated Self-Hosted VPS + DevOps Cost

Break-Even Point: Profitable starting at 28 active users

Calculated infrastructure: Cluster VPS 4 vCPU / 16GB RAM (~$45) + 6h DevOps/mes ($240)

Annual VPS + DevOps Cost$3,420/year
Differential vs SaaS LicensingSaaS is $360/year
Scaleup (100 active users)

Established organization with enterprise security policies and mandatory SAML/SSO.

Base Monthly Cost
$1,200/month
100 active users
12-Month Investment
$12,240/year
Includes ~15% savings via annual billing
3-Year TCO Projection (36m)
$36,720total
Consolidated software licensing expenditure

Estimated Self-Hosted VPS + DevOps Cost

Break-Even Point: Profitable starting at 78 active users

Calculated infrastructure: Infraestructura HA redundante + Backups (~$150) + 16h DevOps/mes ($640)

Annual VPS + DevOps Cost$9,480/year
Differential vs SaaS LicensingSavings of $2,760/year
Usage Surcharges & Bill Shock Simulator: TurnstoneWhat usage costs as you scale
Detect overage penalties before they impact engineering budget.
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Prototype / MVP (10 GB)

Included base quota in plan: 20 GB.
Low Risk / Predictable Bill
Base Monthly Rate
$20/mo
Fixed subscription or contracted tier
Overage Penalty
$0/month extra
Usage covered within plan quota
Estimated Monthly Invoice
$20/mo
Total monthly cost before taxes
Technical Mitigation Recommendation:

Suitable for development; verify concurrent connection limits.

Base Production (50 GB)

Included base quota in plan: 20 GB.
Low Risk / Predictable Bill
Base Monthly Rate
$20/mo
Fixed subscription or contracted tier
Overage Penalty
+$5/month extra
Variable surcharge for consumption above plan quota
Estimated Monthly Invoice
$25/mo
Total monthly cost before taxes
Technical Mitigation Recommendation:

Implement table compression policies and temporal partitioning.

Active Growth (250 GB)

Included base quota in plan: 20 GB.
High Risk / Accelerated Overages
Base Monthly Rate
$20/mo
Fixed subscription or contracted tier
Overage Penalty
+$41/month extra
Variable surcharge for consumption above plan quota
Estimated Monthly Invoice
$61/mo
Total monthly cost before taxes
Technical Mitigation Recommendation:

Offload cold backups to standard object storage (S3).

Large Scale (1.000 GB (1 TB))

Included base quota in plan: 20 GB.
Critical Risk / Severe Bill Shock
Base Monthly Rate
$20/mo
Fixed subscription or contracted tier
Overage Penalty
+$176/month extra
Variable surcharge for consumption above plan quota
Estimated Monthly Invoice
$196/mo
Total monthly cost before taxes
Technical Mitigation Recommendation:

Migrate to dedicated instance or self-hosted cluster to curtail I/O fees.

Procurement Strategy & Discounts: TurnstoneB2B Negotiation Playbook
Corporate executive level with highest authority to approve budgetary exceptions.
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Fair Market Price & B2B Procurement Benchmark

Non-renewal notice: 30 days before expirationMedian achieved discount: -12%
Public List Price
Custom / Contact
100% baseline
Audited Market Average
-12% median
~88% of list price
Optimized Target Price
-20% target
Max achievable discount (Q4 / multi-year): -20%
Security & Data Exit
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Compliance & Security Standards: Turnstone

SOC 2 Type IINot reported
ISO 27001Not reported
GDPR / RGPDNot reported
HIPAANot reported
PCI-DSSNot reported
Jurisdiction & Legal Sovereignty
🇺🇸United States [US]Subject to US CLOUD ActDPA On Request
SSO Availability (SAML Enterprise)
No SSO Documented
Data Residency
US
AI Privacy Policy
Opt-out available
Data Liberation & Migration Runbook: TurnstoneCSV · JSON
Actionable escape runbook and credential export guarantees to mitigate vendor lock-in.
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Supported Structured Export Formats
CSVJSON
Password Hash Portability
Subject to Support Ticket (Manual Process)

Credential hash export requires commercial mediation or formal support ticket approval.

CLI Command / Rescue Endpoint
GET /api/v1/export/full (Requires Enterprise API Token)
Exit Protocol & Migration Notes

Automated extraction via Enterprise API or formal support request.

Deployment & Infrastructure Requirements: TurnstoneDocker
Hardware specs and Docker directives to run on local servers, dedicated VPS, or Kubernetes without telemetry leak to the cloud.
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Minimum Memory1 GB RAM (Recommended)
Compute CPU1 vCPU
Runtime / LanguageTypeScript / Go / Rust
Code LicenseOpen Source
Docker CLI Directive
docker run -d --name turnstone -p 8080:8080 turnstone:latest
Companion Services & Dependencies:
PostgreSQL 15+Redis 7+
Community & Repository
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Technical Reputation of Turnstone

68/100 Technical Trust

Frequent Praises in Production

  • Multi-model support via existing AI subscriptions.
  • Agent-based architecture with persistent memory.
  • Task delegation capabilities across specialized agents.

Reported Production Frictions

  • Currently exclusive to the macOS platform.
  • Requires external AI service dependencies.
Commercial Treatment & Vendor Lock-in:Requires Sales Contact

Assisted cancellation requiring meeting with account team or contract notice period.

Frequently Asked Technical Questions (Turnstone)

Which AI models are supported?

Turnstone is model-agnostic, supporting OpenAI, Claude, Gemini, Grok, and OpenRouter, as well as Ollama and custom API keys.

Can I use my own API keys?

Yes, Turnstone supports the use of custom API keys to run agents in addition to existing AI service subscriptions.

What platforms are supported?

Turnstone is currently available as a native macOS app, with cloud, web, and iPhone versions in development.

Direct Alternatives

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