Gateman vs Doppler and Infisical: Choose How Your Application Uses Credentials

A provider key is only the start of an integration. The application still has to load it, authenticate to the service, make the right API calls, handle test behavior, and keep that code working. Doppler and Infisical help teams organize and deliver secrets across environments. Gateman also retrieves authorized application secrets, and adds defined provider operations, account API relays, and supported infrastructure setup.

Choose what to centralize: secret delivery, the application work around a credential, or both.

Secret storage and delivery: real overlap

Doppler organizes secrets in projects and environment-specific configs, delivering them through its CLI and integrations. Infisical organizes secrets by project, environment, and path, with workload identities, CLIs, SDKs, agents, and syncs. Both provide broad secrets management across development, CI/CD, and production, with dynamic credentials for supported systems.

Gateman has its own app-scoped retrieval paths. With secrets:read, an application calls POST /secrets/get and receives the requested authorized values. For custom secrets, the application's declared environment selects the production value for production and a shared test value for staging or development; if that slot is empty, Gateman does not fall back to the other. The application receives the plaintext and uses it itself. This is a defined retrieval pattern, alongside—not a replacement for—the broader project, path, sync, and workload-management features in Doppler and Infisical. See Gateman custom secret retrieval.

Database passwords are separate: db:read and POST /db/get retrieve one named password at a time, with no environment selector. Host, database name, username, and connection details remain with the application. See database-password retrieval.

When Gateman can do the provider work

Consider an application that sends order receipts through Amazon SES. With Doppler or Infisical delivering the AWS credential, the application loads that value and makes the SES call itself. The team writes and maintains the AWS authentication and SDK integration, and arranges a separate way to test email without sending to real recipients.

With Gateman, the application uses an official client and the documented email.send contract. The app selects its configured email provider route, such as POST /send/ses, and sends the documented message fields. Gateman applies the provider credential at the service boundary. Development and staging messages are captured in Gateman's mailbox; production messages go through the selected configured provider. The application authenticates to Gateman with its app credential; the SES key stays configured in Gateman. The same production-intended sending code can run across those environments, without AWS credential loading, direct SES authentication, or a separate mock transport just for nonproduction email. The request has Gateman's documented message shape; it is not an unchanged AWS SES SDK payload. See send email.

The same choice applies to other supported work. stripe:use accepts native Stripe request methods, paths, and bodies through /stripe/request, selecting the configured test or live credential for the declared environment. For S3 and R2, Gateman creates supported presigned operations and the application transfers object bytes directly to the provider. Each capability keeps its own request contract; Gateman does not turn them into a universal provider API. See the Stripe, S3, and R2 references.

AI agents: secret tools, request brokers, and app integrations

The agent features in these products solve different tasks.

Doppler's MCP server gives an MCP-compatible agent tools for working with Doppler's API: listing and reading secrets, changing secret/configuration data, and viewing activity. The available operations depend on the server options, and Doppler's API enforces the token's permissions. Doppler currently labels this MCP server experimental. It is a way to work with Doppler; it is not itself a broker that injects a provider credential into every outside API request.

Infisical Agent Vault is a closer match for credential-isolated agent requests. An operator configures credentials and service rules, runs the proxy, and routes the agent's HTTP traffic through it. Agent Vault adds or substitutes credentials for matching requests while keeping the real values out of the agent's context; administrators can set how unmatched hosts are handled. It supports agent access and time-limited sessions, and its credential store can be backed by Infisical. This is a real overlap with Gateman's credential-isolated provider access. See the Agent Vault guide and its service rules.

Gateman's coding-agent workflow is centered on implementing an application's enabled capabilities. The console provides app-specific bootstrap instructions; an authenticated POST /client/get (requiring client:read) returns the app's current routes, scopes, environment behavior, and implementation references. The agent can use an official PHP, Node.js, Python, or Go client and follow those contracts as it builds the application integration. At runtime, the application authenticates to Gateman and calls the enabled capability. For mediated operations, the provider credential stays configured in Gateman.

Gateman also offers AWS and Cloudflare administration relays. The application sends a bounded native provider request to /aws/request or /cloudflare/request under aws:use or cloudflare:use; Gateman signs or authenticates it with the app's configured provider credential. AWS IAM and Cloudflare token permissions still determine which provider actions succeed. The Cloudflare relay has one app-level cloudflare:use capability, not separate Gateman read and write scopes. This model can let an authorized agent inspect or change provider configuration without receiving the underlying provider key. It differs from Agent Vault's configurable outbound proxy: Gateman exposes documented application routes and capability contracts, alongside its purpose-built operations. See the AWS relay and Cloudflare relay.

Setup can extend beyond the application

An SES integration may also involve IAM identities, domain authentication, DNS, tracking, and suppression configuration. Gateman Premium can provision the supported setup after the customer provides temporary AWS setup access, restricted Cloudflare DNS access, a region, and a domain. It configures the required IAM identities, SES domain and DKIM, DNS records, configuration set, SNS tracking, and Gateman suppression integration.

Provision SES in as little as three minutes, compared with approximately 20–30 minutes for comparable manual AWS and DNS work. AWS production-sending approval remains a separate AWS process. This is infrastructure Gateman sets up for its supported email capability, rather than simply another place to store an SES key. See the SES provisioning guide.

Compare the workflow

Developer need	Doppler	Infisical	Gateman
Organize environment-specific secrets	Projects, environments, configs, and integrations	Projects, environments, secret paths, identities, and syncs	App-scoped named values; custom retrieval selects production or shared staging/development slots
Deliver secrets to workloads	CLI and deployment integrations supply values to processes; OIDC identities are available for supported authentication flows	CLI, SDKs, Infisical Agent, machine identities, operators, and syncs support different workload patterns	`secrets:read` returns authorized values to the app; `db:read` separately returns one named database password
Use short-lived credentials	TTL-based dynamic-secret leases for supported integrations (Doppler lists this as an Enterprise feature)	Dynamic secrets and automated rotation for supported systems	Named stored database passwords and configured provider credentials, not a general dynamic-secret engine
Give an AI agent access	MCP tools for Doppler API operations, governed by Doppler token permissions	Agent Vault proxies configured agent HTTP requests and attaches stored credentials	Bootstrap, official clients, and `/client/get` help an agent implement app capabilities; the app then calls Gateman's defined routes
Run provider operations without putting the provider key in the app	The app normally receives a delivered credential and calls the provider	Agent Vault can broker agent requests; ordinary app secret delivery makes values available to the workload	Built-in email sending, Stripe request relay, and S3/R2 presigning use configured provider credentials
Administer provider accounts	Applications or agents can use delivered credentials and provider integrations	Agent Vault can broker configured provider API traffic through its service rules	AWS and Cloudflare application relays forward bounded native provider requests under Gateman app capabilities
Provision supported service infrastructure	Integrations and automation can support a team's setup workflow	Integrations and automation can support a team's setup workflow	Premium automates the supported SES, IAM, DNS, tracking, and suppression setup

Choose one, or combine them

Choose Doppler or Infisical when your main need is a broad source of truth for secrets, environment configuration, workload access, and delivery into different deployment targets. Their native environment, identity, sync, and lifecycle tools are designed for that job.

Choose Gateman when you want an application to call a supported provider operation without carrying that provider's credential, or when you want its defined AWS and Cloudflare relays and SES setup workflow. Gateman also has scoped custom-secret retrieval and separate named database-password retrieval.

Using both can make sense. A secrets platform can manage the application's unrelated configuration and deliver its Gateman signing material, while Gateman handles the supported provider operation. Infisical Agent Vault can similarly broker agent HTTP requests, while Gateman provides an application-facing contract for its specific operations and provisioning workflows. The choice depends on whether you want a general secret-delivery or request-brokering layer, defined service capabilities, or both.

Start with the provider integration your team keeps rebuilding. Configure that provider in Gateman, enable the relevant capability, and give your coding agent the application's bootstrap instructions. Instead of writing another provider-authentication layer, the agent can implement the feature against Gateman's documented contract. For email, test the production-intended implementation in staging without sending a real message—and reuse the same approach in your next application.