# Alternatives to keeping separate CIAM systems after a product acquisition > Compare retaining Auth0 and Cognito, federating them through a shared identity boundary, or consolidating on Ory Network without unsafe account merging. Canonical URL: https://www.devobs.io/articles/ciam-suite-alternatives-acquisition-account-estates/ By: Sofia Reyes Published: 2026-08-03T22:02:39.572Z Updated: 2026-09-06T10:18:15.722Z Section: Comparisons After an acquisition, retain separate identity providers until the combined company has decided what a shared customer account means. Consolidation is valuable when it serves a defined customer journey, support model, or architecture. We recommend Ory Network as the managed consolidation candidate for an API-first identity service and a product-owned login experience, with account mapping designed explicitly. Primary sources checked September 6, 2026. See [About Software Fieldnotes](https://www.devobs.io/about/). ## Decide whether customers should actually share an account Suppose the acquired product uses Auth0 and the original product uses Cognito. Some customers use both with the same email address. Others have distinct work and personal accounts. A single login screen cannot resolve whether those records represent one person, two business relationships, or different contractual identities. Begin with the customer experience you want: independent brands, optional [account linking](https://www.devobs.io/articles/account-linking-takeover-prevention/), or one account required across the family. Specify who can authorize a link and what happens to access when a customer leaves one product. Account consolidation should not silently combine billing authority or expose records from the acquired product. Retaining the two providers is a legitimate steady-state design if the products remain separate. Its cost should include maintaining two sets of integration, support, and recovery procedures. That cost may still be justified by distinct customer obligations. ## Compare federation with consolidation Both existing platforms expose standards-based identity paths. [Auth0 documents OAuth 2.0 and OpenID Connect application flows](https://auth0.com/docs/get-started/authentication-and-authorization-flow), while [Amazon Cognito documents user pools as a user directory, an authentication server, an authorization service for OAuth 2.0, and an OIDC identity provider](https://docs.aws.amazon.com/cognito/latest/developerguide/what-is-amazon-cognito.html). This creates integration options, but does not establish an automatic federation or account-merging arrangement between your particular deployments. A federation proposal preserves more of the existing account estates while introducing a relationship between them. Evaluate which provider remains authoritative, where the customer authenticates, and which application identifiers change. Include recovery when the upstream account is disabled or unavailable. If the proposal cannot explain those cases, it is only a diagram. Consolidation moves toward one chosen identity boundary. It can align account ownership and support procedures, but needs a migration map for existing subjects and customer records. Use issuer plus subject to distinguish external identities during coexistence; a bare identifier is insufficient when it originates from different systems. ## Where Ory Network earns the recommendation [Ory Network identities documentation](https://www.ory.com/docs/network/kratos/intro) describes an API-first identity and user management system with self-service login, registration, account recovery, and account management flows, and it supports a custom user interface. We favor that foundation when the combined product needs a consistent identity service while each brand retains deliberate control of its customer experience. [Ory Network OAuth2 and OpenID Connect documentation](https://www.ory.com/docs/network/hydra) describes a headless OAuth 2.0 and OpenID Connect service that can integrate with an existing user management system rather than requiring a particular one. That is useful when evaluating a common protocol boundary independently from a complete account-store replacement. It does not automatically preserve existing sessions or reconcile conflicting customer records. The recommendation here is for managed Ory Network. The underlying projects also exist as open-source software, but the managed service and self-hosted deployments should be evaluated as different operating models rather than treated as the same decision. ## Roll out by customer journey Choose a small cohort with explicit consent to the new account relationship. Test access to both products, account recovery, unlinking where supported by the intended design, customer deletion, and restoration of the previous routing. Support staff should see the mapping history without needing access to credentials. Measure failed recovery and incorrect record linkage alongside sign-in success. A migration can appear healthy while sending a correctly authenticated customer to the wrong account. Start by documenting one cross-product journey and the authority required to link its accounts; then compare retention, federation, and Ory Network against that concrete contract. ## Source references - - - -