Akeyless alternative: Crunu vs Akeyless

Akeyless and Crunu both aim at the same promise, that the vendor should not be able to read your secrets, and they get there by different routes. Akeyless splits key material into fragments that its service holds, and adds an optional Customer Fragment kept in a Gateway you run; only with that fragment does its documentation say Akeyless "cannot complete cryptographic operations without the customer's involvement". Crunu has no fragments and no gateway: values are encrypted on your devices, and the server stores only ciphertext in every configuration.

Akeyless is also a much broader platform than Crunu. It generates dynamic secrets, syncs to cloud secret stores, injects secrets into Kubernetes pods and signs people in through your identity provider. Crunu does none of these. This page is for teams weighing that breadth against a simpler model of who can decrypt.

Who each one fits

Akeyless fits organizations that want one SaaS platform for static and dynamic secrets across clouds, Kubernetes clusters and CI systems, with sign-in through SAML or OIDC. Its Hybrid SaaS option adds Gateways you run on your own network, and the Customer Fragment gives regulated teams a hard control boundary, at the price of more setup and lifecycle work.

Crunu fits engineering teams whose secrets are mostly .env files, cloud credentials and API keys read by people, servers and pipelines. It fits teams that want the server unable to decrypt from the first day, without deploying anything extra, and, on the Enterprise plan, teams that want to host the whole vault themselves on Docker, Cloudflare Workers, Vercel or Google Cloud Run.

Who can decrypt, with and without a gateway

Akeyless describes its Customer Fragment as the strongest separation it offers: protected operations "cannot complete without customer fragment participation". Its own documentation also lists the cost: "Higher setup and lifecycle overhead for fragment generation, backup, rotation planning, and deployment integration." The Gateway that holds the fragment is yours to run, and when caching is enabled it "can cache secret values and metadata in customer-controlled cache layers". Without a Customer Fragment, the guarantee that Akeyless cannot finish an operation on its own is not part of the documented model.

Crunu makes the same boundary the default, and keeps it simple. Every environment has its own key, sealed separately to the public key of each person, machine and pipeline that may read it. The server stores ciphertext, public keys and signed documents, and the list of who may read an environment is a document signed by an administrator, so a compromised server cannot quietly add itself as a reader. There is nothing extra to deploy, back up or plan rotation for.

This is not a claim that Crunu is the only product where the vendor cannot decrypt. Akeyless with a Customer Fragment, Bitwarden Secrets Manager and Phase in its default mode make similar promises. The difference is how much you deploy to get it, and what the product does when someone leaves: the member removal flow rotates every key the person held, shows which versions they received, and lists values to reissue. Crunu's limitations page covers what the model does not protect, such as metadata and malicious code on a device where keys are decrypted.

Where Akeyless is stronger

• Dynamic secrets and rotation. Akeyless generates credentials for databases, clouds and other targets on each access. Crunu never will, since that needs a key on the server.
• Integrations. The Universal Secrets Connector manages and syncs secrets in AWS, GCP, Azure, Kubernetes and Vault, and the Kubernetes Secrets Injector adds secrets to pods. Crunu has no syncs and no Kubernetes support.
• Identity. People can sign in through SAML or OIDC identity providers. Crunu has no SSO and no SCIM.
• Platform breadth. Akeyless covers static secrets, dynamic secrets and secret sharing in one SaaS service, with Gateways for private networks. Crunu is focused on environments, machines and CI.

Moving from Akeyless to Crunu

Dynamic secrets, rotated secrets, syncs and Kubernetes injection have no equivalent in Crunu. If you depend on them, keep Akeyless for those jobs and move only static environment values.

Other Akeyless alternatives

If you need dynamic secrets, look at HashiCorp Vault, self-managed or as HCP Vault Dedicated; its server decrypts once unsealed. Infisical and Doppler add dynamic secrets on higher plans, and both decrypt on their servers. If the vendor must not decrypt, Phase and Bitwarden Secrets Manager encrypt on the client by default.

If you are weighing a platform against your cloud provider's own store, HashiCorp Vault vs AWS Secrets Manager covers that trade-off. The who can decrypt guide puts all of these tools side by side.