When should I switch from Keploy to Total Shift Left?

When you need tests to exist before there is production traffic to capture, when your APIs span SOAP or GraphQL and not just REST, or when your organization can't send specs, traffic, or code to a third-party cloud AI service and needs a self-hosted LLM story instead.

Can Total Shift Left replace Keploy entirely?

The two products genuinely overlap on one point: Keploy's free Playground also accepts an OpenAPI spec or Postman collection to generate tests, similar to Total Shift Left's core workflow. Beyond that entry point, Keploy's primary method is production-traffic capture and replay, while Total Shift Left is spec-driven across REST, SOAP, and GraphQL with self-hosted LLM support — teams that need contract-first testing and regulated-environment deployment move the bulk of their suite to Total Shift Left.

The open-source core and the Playground are free with no credit card required. Paid usage starts at the Pro tier ($19/user/month) plus usage-based pricing of $0.16 per test generated and $0.22 per test run, with a custom-priced Enterprise tier above that.

How does Keploy's 'digital twins' approach compare to spec-driven generation?

Keploy's core mechanism is capturing real production or staging traffic and replaying it as tests — a 'digital twin' of how your API is actually used. Total Shift Left instead generates tests directly from your OpenAPI, Swagger, or WSDL contract, so coverage exists from day one rather than depending on what traffic has already been observed.

Does Keploy support self-hosted or on-premise AI generation?

We found no evidence of an on-prem, air-gapped, or self-hosted-LLM deployment option for Keploy's AI generation — it appears to be cloud-hosted. Total Shift Left runs generation against Ollama, vLLM, or LM Studio on your own infrastructure, which matters for regulated enterprises that cannot send specs or traffic to a third-party cloud service.

Comparison

Total Shift Left vs Keploy

Name: Total Shift Left
Brand: Total Shift Left
Availability: InStock

Keploy builds tests by capturing and replaying real production traffic — a 'digital twin' of how your API is used. Total Shift Left generates tests from your API contract before traffic ever exists, with a self-hosted LLM option for teams that can't use a third-party cloud AI service.

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Why teams move from Keploy to Total Shift Left

Keploy is a strong open-source choice for capturing existing production traffic. Total Shift Left is built for teams that need contract-first coverage, multi-protocol breadth, and an AI story that regulated enterprises can actually deploy on their own infrastructure.

Spec-first, not traffic-first

Generate tests from your OpenAPI, Swagger, or WSDL contract before there's any production traffic to capture — coverage exists from day one, not after launch.

A self-hosted LLM story for regulated teams

Run AI generation against Ollama, vLLM, or LM Studio on your own infrastructure. Nothing about your API spec or traffic goes to a third-party cloud service.

REST, SOAP, and GraphQL in one platform

Keploy's documented strength is HTTP API traffic capture. Total Shift Left tests REST, SOAP/WSDL, and GraphQL from the same spec-driven workflow.

Feature-by-feature comparison

Feature	Total Shift Left	Keploy
Test creation approach	AI-generated from OpenAPI/WSDL specs — no code, no traffic capture required	Production traffic capture & replay ('digital twins'); OpenAPI/Postman import also available via the free Playground
Core method	Contract-first: tests generated from your API spec before code ships	Traffic-first: records real production/staging traffic and replays it as tests
Self-hosted LLM support	Ollama, vLLM, LM Studio — run generation on your own infrastructure, nothing leaves your network	Cloud-hosted AI generation; no self-hosted-LLM option found
Protocol support	REST, SOAP/WSDL, GraphQL with spec-driven automation	Primarily HTTP API traffic capture; SOAP/GraphQL breadth not documented
API spec import	OpenAPI 3.0/3.1, Swagger 2.0, WSDL with auto-discovery	OpenAPI and Postman collection import via the free Playground (entry point, not the primary method)
Coverage tracking	Endpoint, method, status code, parameter coverage with gap identification	No published coverage-gap tracking
Contract testing	Built-in schema validation against OpenAPI/WSDL; fail builds on drift	Not spec-driven — fidelity depends on the diversity of captured traffic
Developer tooling	Native CI/CD plugins for Jenkins, GitHub Actions, Azure DevOps, GitLab, CircleCI, Bitbucket	VS Code extension (1,185,821 installs, 5.0★ from 160 reviews); GitHub Marketplace app that comments AI-generated unit tests on PRs
Licensing / project maturity	Commercial platform with a forever-free tier	Open source (Apache-2.0), 18.4k GitHub stars, 2.3k forks
Enterprise governance (SSO, RBAC, audit log)	SSO, role-based access control, audit logs, and multi-tenant workspaces on Enterprise	Not published
API mock server	Built-in static & dynamic mocks with condition-based responses	Not part of the verified feature set
Pricing model	Forever-free Citizen Developer Edition + 15-day Enterprise trial; transparent custom pricing	Free OSS core + free Playground; Pro tier $19/user/month plus usage-based pricing ($0.16 per test generated, $0.22 per test run); custom Enterprise

Enterprise readiness

What procurement, security, and platform-engineering actually ask about — deployment posture, AI policy alignment, access control, and audit evidence.

Feature	Total Shift Left	Keploy
Deployment options	SaaS, single-tenant private cloud, or fully self-hosted on your infra	Open-source core (Apache-2.0, self-hostable) plus hosted Pro/Enterprise tiers
Self-hosted LLM (no spec leaves your perimeter)	Yes — Ollama, vLLM, LM Studio, or any OpenAPI-compatible endpoint inside your perimeter	Cloud-hosted AI generation; no self-hosted-LLM option found
Air-gapped support	Supported — no required outbound network calls when using a local model	Not published
Multi-protocol coverage (REST + SOAP + GraphQL)	REST, SOAP/WSDL, and GraphQL — all first-class	Primarily HTTP API traffic capture; SOAP/GraphQL breadth not documented
SSO (SAML / OIDC / Azure AD)	SAML 2.0 / OIDC / Azure AD (Entra ID) — available on Enterprise, with auto-provisioning and group-to-role mapping	Not published
Role-based access control	Five built-in roles, project-scoped assignment	Not published
Audit log + exportable evidence	Built-in audit log capture, exportable per release	Not published
Encrypted credential storage	AES-256 at rest; bring-your-own-key for any cloud LLM you choose	Not published
Data residency control	Data stays in your deployment region (or on-prem) by default	Not published
SOC 2 attestation	SOC 2 on roadmap — security questionnaire response shared on architect call	Not published

Wording is current as of publication and reflects publicly documented behavior of each tool. Talk to your procurement and security teams before relying on any single row for a buying decision — we share our security questionnaire response on the architect call.

Which tool is right for you?

Choose Total Shift Left if you...

+ Need a self-hosted-LLM story for regulated or air-gapped environments
+ Test SOAP or GraphQL APIs, not just REST
+ Want contract-first generation straight from your OpenAPI/WSDL spec
+ Need built-in coverage-gap detection and contract-drift gates
+ Want a managed platform with native CI/CD plugins

Keploy might be better if you...

- Already have rich production traffic you want to turn into tests via capture/replay
- Want a free, actively-starred (18.4k) open-source core you self-host
- Want an AI bot that comments generated unit tests directly on GitHub pull requests
- Are comfortable with cloud-hosted AI generation

Frequently asked questions

support@totalshiftleft.com

to learn more

When should I switch from Keploy to Total Shift Left?
When you need tests to exist before there is production traffic to capture, when your APIs span SOAP or GraphQL and not just REST, or when your organization can't send specs, traffic, or code to a third-party cloud AI service and needs a self-hosted LLM story instead.
Can Total Shift Left replace Keploy entirely?
The two products genuinely overlap on one point: Keploy's free Playground also accepts an OpenAPI spec or Postman collection to generate tests, similar to Total Shift Left's core workflow. Beyond that entry point, Keploy's primary method is production-traffic capture and replay, while Total Shift Left is spec-driven across REST, SOAP, and GraphQL with self-hosted LLM support — teams that need contract-first testing and regulated-environment deployment move the bulk of their suite to Total Shift Left.
Is Keploy free?
The open-source core and the Playground are free with no credit card required. Paid usage starts at the Pro tier ($19/user/month) plus usage-based pricing of $0.16 per test generated and $0.22 per test run, with a custom-priced Enterprise tier above that.
How does Keploy's 'digital twins' approach compare to spec-driven generation?
Keploy's core mechanism is capturing real production or staging traffic and replaying it as tests — a 'digital twin' of how your API is actually used. Total Shift Left instead generates tests directly from your OpenAPI, Swagger, or WSDL contract, so coverage exists from day one rather than depending on what traffic has already been observed.
Does Keploy support self-hosted or on-premise AI generation?
We found no evidence of an on-prem, air-gapped, or self-hosted-LLM deployment option for Keploy's AI generation — it appears to be cloud-hosted. Total Shift Left runs generation against Ollama, vLLM, or LM Studio on your own infrastructure, which matters for regulated enterprises that cannot send specs or traffic to a third-party cloud service.

The capabilities behind the difference

Where Total Shift Left pulls ahead of Keploy — see exactly how each capability works.

Spec-driven testing, with a self-hosted AI option

Free Citizen Developer Edition. No credit card. Or start a 15-day Enterprise trial that mirrors the full platform.