Head-to-head · updated 13 September 2026
DataShield vs Alation: your catalog knows the column is sensitive. What stopped the agent?
Alation has been building data catalogs since 2012, and it shows. Glossary, column-level lineage, data quality, stewardship workflow, a connector list that reaches past a hundred sources, and a decade of enterprise references: BBC, Cisco, Nasdaq, Daimler Truck. IDC made them a Leader in data intelligence platforms this month. In July they relabelled the whole stack AIOS, an "intelligence operating system" for enterprise AI. The rebrands come fast, but the catalog underneath is real and it is good.
We are not a catalog for your whole estate, and we will not pretend otherwise. DataShield governs the datasets agents actually read. Datasets are tokenized at ingest; agents query tokenized data over MCP; detokenization is a privileged, audited operation. Every governed tool call gets checked against the agent's authority at the moment of the call, and every decision is sealed into a hash chain anyone can verify without trusting us. Below is the honest split, including the rows Alation wins.
The short version
Pick DataShield when
- Someone will ask you to prove an agent's access log was not edited. An examiner, an auditor, or Article 12 of the EU AI Act. An append-only table is a promise. Our chain is a proof. Run the verifier.
- You need to pull an agent's authority mid-session and have the very next tool call fail. Not the next login. The next call.
- The data plane, the policy decisions and the evidence all have to sit on infrastructure you control, on keys you hold.
- You want a price before you book a call, and you would rather not discover the connector surcharge in month three.
Pick Alation when
- The catalog itself is the project. Hundreds of sources, thousands of tables, a glossary the business will actually read. That is a decade of work and we have not done it.
- Column-level lineage across warehouses and BI tools is the thing your data team needs on Monday. Theirs is automated and mature.
- Procurement wants analyst cover. Five Gartner Magic Quadrant Leader placements, an IDC MarketScape Leader in September 2026, Gartner Peer Insights Customers' Choice in two markets.
- You want a partner-led rollout. Their PwC Canada tie-up ships a packaged OSFI E-21 accelerator for Canadian banks, and consultancies know the platform.
Bottom line: Alation tells your agents what the data means. DataShield decides whether a given call is allowed and keeps proof of the answer. Most teams who buy us already own a catalog, and we would rather sit next to a good one than replace it.
Feature by feature
Competitor cells describe what Alation's public site and press releases say as of the date above. If we have mischaracterised something, email support@myorg.ai and we will correct it, credited.
| What matters | DataShield | Alation | Edge |
|---|---|---|---|
| Catalog breadth | We scan, profile and classify a live PostgreSQL source in place, with no rows leaving it. Assets, columns, a business glossary materialized from entity types, and stewardship worklists all ship. That is PostgreSQL today, not your whole estate. Snowflake, BigQuery, Databricks, S3 and Salesforce are declared on the roadmap with no handler yet. | The core product, and the best part of it. Agent Builder connects to more than 100 sources, and the Open Connector Framework has had a decade of contributions. | ◇ |
| Lineage | Typed lineage over a fixed predicate vocabulary, traversed with per-hop access gating so a user cannot walk to an asset they cannot read. It is derived from the pipelines that own the relationships, not a stored column-level graph. Honest framing: useful, narrower than theirs. | Automated column-level lineage with visual impact analysis, plus an active metadata graph underneath it. Mature and widely deployed. | ◇ |
| Field classification | 129 field classes covering PII, PHI, financial data and secrets, including all 18 HIPAA Safe Harbor identifiers and eight non-US national ID formats. Regex plus checksum validation (Luhn, NPI, Verhoeff, ABA, IBAN, GTIN), column-name lexicons and anti-pattern suppressors. No model in the loop, so a verdict is reproducible from a config digest. | Catalog tagging, policy management and a Critical Data Element Manager launched in November 2025. We found no published classifier inventory or checksum method list. | ◆ |
| Audit evidence | SHA-256 hash chain with Ed25519-signed checkpoints that are themselves chained. Verification names the failure: tampering, insertion, deletion, or truncation. Try the verifier. | Their May 2026 AI governance release describes an append-only audit trail that exports in narrative form for regulators, plus model cards that cite sources per field. Good paperwork. We found no cryptographic tamper evidence. | ◆ |
| Agent authorization | Every governed tool call passes a scope ceiling, a consented-tool allowlist, an authority tier, and a revocation re-check before dispatch. The call fails closed. | Agent Builder says agents "inherit fine-grained access controls from the Alation platform." Inherited catalog permissions are a starting state. We found no per-call decision point described. | ◆ |
| Break-glass | Scoped, time-boxed emergency access for agents. Admin plus IP allowlist plus step-up, auto-revoking, and it cannot be quietly removed from the log. | Not described in their public material. | ◆ |
| GDPR erasure | Crypto-shred of per-subject key material plus ISO 27560 consent receipts. Actor identities in the chain are HMAC-committed, so the audit trail still verifies once the subject is gone. | Policy management and support for GDPR, CCPA and HIPAA programs. The catalog governs the process. The erasure mechanism lives in the source systems, not in Alation. | ◆ |
| Tokenization and masking | Deterministic, join-preserving, vault-reversible tokens applied at ingest, plus quasi-identifier generalization (dates to year, decade or age band; ZIPs to 3 or 4 digits; partial phones, SSNs and emails) with a measured cardinality-reduction score per column. These are features you switch on, not defaults. Detokenization is privileged and logged. | Not vocabulary they use. Alation describes and governs data. It does not transform values. | ◆ |
| MCP and agents | More than 200 MCP tools across Ontology, Auth, Corpus and Lighthouse, live today. Auth issues MCP tool tokens with scope ceilings, delegation is RFC 8693 token exchange with an enforced ceiling, and every call is metered and attributed to the agent. | Agent Builder shipped as a private beta in October 2025 and can be embedded in other apps "via MCP or REST." Prebuilt query, search and dashboard agents, with evaluations targeting 90% accuracy. Newer than their catalog, and worth asking what is generally available today. | ◆ |
| Sample handling | Catalog scans store no column values by default. Storing plaintext samples takes an explicit acknowledgement and writes an audit row, and an operator can see exactly how many columns hold values in the clear. | Catalog previews and profiling are part of the product. We could not find a published default for whether sampled values are stored. | ◆ |
| Deployment | Self-hosted in your own cloud or data center, or a dedicated single-tenant server we operate. Docker images ship for Auth, Ontology, Corpus and Lighthouse, and a signed deploy manifest is verified before rollout. Ed25519 audit-signing keys can live in your KMS or HSM. HMAC tokenization keys sit in your environment today, not in a KMS. | Alation Cloud Service is the recommended path. Customer-Managed Alation exists for on-prem, with an agent component to reach on-prem sources from the cloud. AWS Marketplace listing with PrivateLink. | ◈ |
| Maturity signals | Auth, Guardian and Lighthouse are live in production (Guardian and Lighthouse since April 2026). SOC 2 not yet certified, and we say so. | Founded 2012, roughly $340M raised, five Gartner Magic Quadrant Leader placements, IDC MarketScape Leader in September 2026, and named customers a startup cannot match. | ◇ |
| Pricing | Published model, scoped instant quote, no sales wall. | Quote only, gated on seat tier, connected sources and modules. Third-party teardowns put a 25-seat deployment near six figures before connectors, but Alation publishes no figures, so treat those numbers as estimates. | ◆ |
◆ DataShield leads◇ Alation leads◈ comparable
Alation claims are drawn from alation.com and Alation's own press releases, last checked 13 September 2026. We link them below rather than work from memory.
Three things you get here that you won't get from a data intelligence platform
Proof, not an export
Append-only means nobody is supposed to edit it. A hash chain means nobody can, and if they try, the verifier says which row broke and how. That is the property EU AI Act Article 12 and HIPAA §164.312(b) reviewers care about. Try it in your browser, no signup.
Authority that changes mid-flight
An analyst hands in her badge at 4pm on a Friday. Her agent is 20 minutes into a 40-minute job. With DataShield the next governed tool call is re-checked against current authority and fails closed. Inherited catalog permissions get you the state at login, not the state right now. How Auth does it.
An erasure you can defend
GDPR says delete. Your auditor says keep the log. Crypto-shred settles it: the subject's key material is destroyed, the data goes unreadable, and the chain still verifies. See the diagram.
Where Alation is genuinely stronger
We would rather you heard this from us. Alation has been at this since 2012 and helped invent the category. Their connector list, their column-level lineage, and their glossary are years of work we have not matched and are not trying to match. Business users open Alation and find things, which sounds small and is the hardest problem in this market. The analyst record backs it up: five Magic Quadrant Leader placements, an IDC MarketScape Leader in September 2026, Customers' Choice in two Gartner Peer Insights markets. Their May 2026 AI governance release is smart too. An asset registry for models and agents, model cards with cited evidence, and approval routing that pushes high-risk EU AI Act assets to Legal and the CISO. And the PwC Canada partnership around OSFI E-21 shows they can package regulation into a product, which most vendors talk about and few do.
Here is the push-back. Read their agent story closely and the control is inheritance: agents pick up the access controls the catalog already holds. That answers who may see a table. It does not answer whether this call, made by this agent, at 3am, with these arguments, was allowed. Their evidence answer is an append-only trail exported as a narrative for regulators, which is a document about what happened rather than an artifact an outside party can check. Gartner expects most unauthorized agent transactions through 2028 to be internal policy violations, not attacks. That is the case where good paperwork is weakest. A catalog is how you know the column holds a patient's MRN. We are how you show that the agent asking for it was allowed to, on the day it asked.
Questions worth asking both of us
These are the questions we would want answered if we were the ones buying. Ask them on every call, ours included.
Can you cryptographically prove an audit log entry wasn't deleted?
DataShield: yes. Each record commits to the one before it, checkpoints are signed and chained, and verification tells deletion apart from truncation and from tampering. Run it against a sample chain at /verify. Alation: their AI governance release describes an append-only audit trail with narrative export. We found no published tamper-evidence mechanism. Ask them what happens if a database admin edits a row.
What happens to a revoked agent mid-session?
DataShield re-checks authority on every governed tool call, so revocation lands on the next call. Alation's Agent Builder says agents inherit fine-grained access controls from the platform. We could not find a mid-session revocation mechanism in their public docs. Ask how long a compromised agent keeps working after you pull its access.
How does GDPR erasure interact with the audit trail?
DataShield crypto-shreds per-subject key material and issues an ISO 27560 consent receipt. The evidence chain still verifies once the subject is gone. Alation manages the policy and the program around erasure, while the deletion itself happens in your source systems. Ask each vendor for the mechanism, not the workflow.
Is Alation Agent Builder generally available, or still in beta?
Worth asking directly. It was announced on 1 October 2025 as a private beta, with press coverage putting general availability in Q1 2026. A lot has been relabelled since, including the AIOS launch in July 2026. Ask which agent features are shipping today, which are in beta, and which arrive with your renewal. Our MCP surface is more than 200 tools across Ontology, Auth, Corpus and Lighthouse, in production now, and you can point a client at it during the trial.
We already run Alation. Does DataShield replace it?
No. Keep the catalog. We do not scan your whole estate, we have one provider kind in general availability, and their glossary and lineage do things ours does not. Run us underneath, on the datasets agents touch, where the obligation is enforcement and evidence rather than description. Most of our conversations start with a customer who already owns a catalog and cannot answer an auditor's question with it.
Does DataShield have SOC 2?
Not yet, and we will not imply otherwise. We publish a threat model, and anyone can run the chain verifier. Auth is live, and Guardian and Lighthouse have been in production since April 2026. Design-partner terms include source escrow, so a small vendor is not a single point of failure. Details on the security page.
- Alation launched AIOS, an "operating system designed to help enterprises govern AI," bundling Agent Studio, Agentic Compliance, Agentic Data Governance and Conversational Analytics. — Alation newsroom, 14 Jul 2026
- Agent Builder: no-code agents for structured data, more than 100 sources, embeddable "via MCP or REST," agents "inherit fine-grained access controls from the Alation platform." Private beta at announcement. — Alation newsroom, 1 Oct 2025
- AI governance offering: AI asset registry, model cards with cited evidence, regulation registry, and an append-only audit trail exported in narrative form for regulators. — Alation newsroom, 11 May 2026
- Curation Automation reached general availability, with "outcome-based governance": declare the standard once, agents enforce it continuously. — Alation newsroom, 9 Mar 2026
- Named a Leader in the 2026 IDC MarketScape for Worldwide Data Intelligence Platform Software, one of 15 vendors evaluated. — Alation newsroom, 4 Sep 2026
- PwC Canada partnership packages an OSFI Guideline E-21 accelerator for Canadian banks, with agents automating critical data element classification, lineage tracing and audit evidence. — Alation newsroom, 12 Aug 2026
- Named a Leader for the fifth time in the Gartner Magic Quadrant for Metadata Management Solutions. — Alation newsroom, 21 Nov 2025
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