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, steward workflow. A connector list that reaches past a hundred sources. A decade of big-name references: BBC, Cisco, Nasdaq, Daimler Truck. IDC named them a Leader this month. In July they gave the whole stack a new name. AIOS, an "intelligence operating system" for enterprise AI. The renames come fast. But the catalog under it all is real, and it's good.
We are not a catalog for your whole estate, and we won't pretend otherwise. DataShield checks the datasets agents actually read. We tokenize datasets at ingest. Agents query tokens over MCP, not raw values. Turning a token back into real data is a special, audited step. We check each checked tool call against the agent's access. That happens right at the moment of the call. We seal each call into a hash chain. Anyone can check it without trusting us. Below is the honest split. It includes the rows Alation wins.
The short version
Pick DataShield when
- Someone will ask you to prove an agent's access log was not edited. Maybe an examiner. Maybe an auditor. Maybe Article 12 of the EU AI Act. An add-only table is a promise. Our chain is a proof. Run the verifier.
- You need to pull an agent's access mid-session. You want the very next tool call to fail. Not the next login. The next call.
- The data plane, the policy calls and the proof all have to sit on infrastructure you control, on keys you hold.
- You want a price before you book a call. 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's a decade of work, and we haven't done it.
- Column-level lineage across warehouses and BI tools is what your data team needs on Monday. Theirs is automated and mature.
- Procurement wants analyst cover. Five Gartner Magic Quadrant Leader spots. 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. 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. We would rather sit next to a good one than replace it.
Feature by feature
Competitor cells say what Alation's public site and press releases say. We use the date above. If we got something wrong, email support@myorg.ai. We'll fix it and credit you.
| What matters | DataShield | Alation | Edge |
|---|---|---|---|
| Catalog breadth | We scan, profile and sort a live PostgreSQL source in place. No rows leave it. Assets, columns, a term list built from entity types, and steward worklists all ship. That's PostgreSQL today, not your whole estate. Snowflake, BigQuery, Databricks, S3 and Salesforce sit on the plan, with no handler yet. | The core product, and the best part of it. Agent Builder connects to more than 100 sources. The Open Connector Framework has had a decade of work put into it. | ◇ |
| Lineage | Typed lineage over a fixed set of link types. We gate each hop by access. A user can't walk to an asset they can't read. It comes from the pipelines that own the links, not a stored column-level graph. Honest framing: useful, but narrower than theirs. | Automated column-level lineage, with visual impact views. Plus an active metadata graph under it. Mature and widely used. | ◇ |
| Field classification | 129 field classes. They cover PII, PHI, financial data and secrets. This covers all 18 HIPAA Safe Harbor IDs, and eight non-US ID formats. Plus checksum checks: Luhn, NPI, Verhoeff, ABA, IBAN, GTIN. Plus column-name lists and filters for odd patterns. No model in the loop. A verdict repeats from a config digest, every time. | Catalog tagging, policy rules and a Critical Data Element Manager launched in November 2025. We found no posted classifier list or checksum method list. | ◆ |
| Audit evidence | SHA-256 hash chain with Ed25519-signed checkpoints. We chain the checkpoints too. A check names the failure: tampering, insertion, deletion, or a cut-off tail. Try the verifier. | Their May 2026 AI governance release says it has an add-only audit trail. It exports in story form for regulators, plus model cards that cite sources per field. Good paperwork. We found no crypto proof against tampering. | ◆ |
| Agent authorization | Each checked tool call passes a scope ceiling. Plus a list of tools the user agreed to. Plus an access tier, and a re-check that access wasn't pulled, before it runs. The call fails closed. | Agent Builder says agents "inherit fine-grained access controls from the Alation platform." Inherited rights are a starting state, not more. We found no per-call check point. | ◆ |
| Break-glass | Scoped, time-boxed emergency access for agents. Admin plus IP allowlist plus step-up. It auto-revokes. No one can quietly remove it from the log. | Not described in their public docs. | ◆ |
| GDPR erasure | Crypto-shred of per-subject key material, plus ISO 27560 consent receipts. We HMAC-commit actor IDs in the chain. The audit trail still checks out, even once the subject is gone. | Policy management and support for GDPR, CCPA and HIPAA programs. It governs the process. The erasure step lives in the source systems, not in the tool itself. | ◆ |
| Tokenization and masking | Deterministic, join-preserving, vault-reversible tokens, applied at ingest. Plus quasi-identifier generalization. Dates become year, decade or age band. ZIPs become 3 or 4 digits. We mask phones, SSNs and emails in part. Each column gets a cardinality-reduction score. These are features you switch on, not defaults. We treat turning a token back as special. We log it. | Not their vocabulary. They label and govern data. They don't 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 uses RFC 8693 token swaps, with a set ceiling. We meter each call and tie it to the agent. | Agent Builder shipped as a private beta in October 2025. You can embed it in other apps. It works "via MCP or REST." It ships prebuilt query, search and dashboard agents. Evaluations aim at 90% accuracy. Newer than their catalog. Worth asking what's generally available today. | ◆ |
| Sample handling | Catalog scans store no column values by default. Storing plain samples takes an explicit yes, and writes an audit row. 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 posted default. Do they store sampled values? Unclear. | ◆ |
| Deployment | Self-hosted, in your own cloud or data center. Or a dedicated single-tenant server we run. Docker images ship for Auth, Ontology, Corpus and Lighthouse. We check a signed deploy file before rollout. Ed25519 keys for signing stay on your box, in a key folder you own. Rotation uses key IDs. It fails closed on an unknown key. KMS or HSM custody is a built seam in Auth, not a shipped link. HMAC keys sit on your box today, not in a KMS. | Alation Cloud Service is the path they push. A customer-run version exists for on-prem use. It has an agent part 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 have run since April 2026. SOC 2 isn't certified yet, and we say so plainly. | Founded 2012. About $340M raised. Five Gartner Magic Quadrant Leader spots. IDC MarketScape Leader in September 2026. Named clients a startup can't 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 links. Alation posts no figures, so treat those numbers as estimates. | ◆ |
◆ DataShield leads◇ Alation leads◈ comparable
We draw Alation claims from alation.com and Alation's own press releases. Last checked 13 September 2026. We link them below, not just from memory.
Three things you get here that you won't get from a data intelligence platform
Proof, not an export
Add-only means nobody should edit it. A hash chain means nobody can. If they try, the checker says which row broke, and how. That's what EU AI Act Article 12 and HIPAA §164.312(b) reviewers care about. Try it in your browser, no signup.
Access 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, we re-check the next checked tool call against current access. It fails closed. Inherited rights 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. We destroy the subject's key material. The data goes unreadable. The chain still checks out. See the diagram.
Where Alation is genuinely stronger
We would rather you heard this from us. They've been at this since 2012, and helped invent the field. Their connector list, their lineage view, and their glossary took years of work. We haven't matched it, and aren't trying to. Business users open it and find things. That sounds small. It's the hardest problem in this market. The analyst record backs it up. Five Magic Quadrant Leader spots. An IDC MarketScape Leader in September 2026. Clients' Choice in two Gartner Peer Insights markets. Their May 2026 AI rules release is smart too. An asset list for models and agents. Model cards with cited proof. Approval paths push high-risk EU AI Act assets to Legal and the CISO. And the PwC Canada tie-up around OSFI E-21 shows they can turn rules into a product. Most vendors just talk about that. Few actually do it.
Here's the push-back. Read their agent story closely. The check is inheritance. Agents pick up the access rules the system already holds. That answers who may see a table. It doesn't answer whether this call was allowed. This agent, at 3am, with these inputs. Their proof answer is an add-only trail. It's exported as a story for regulators. That's a paper trail. It's not something an outside party can check. Gartner expects most bad agent actions through 2028 to be policy breaks from inside. Not attacks. That's the case where good paperwork is weakest. A catalog tells you a column holds a patient's MRN. We show the agent was allowed to ask for it. 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. We sign and chain each checkpoint. A check tells deletion apart from truncation and from tampering. Run it against a sample chain at /verify. Alation: their AI governance release says it has an add-only audit trail, with story-form export. We found no posted tamper-proof method. Ask them what happens if a database admin edits a row.
What happens to a revoked agent mid-session?
DataShield re-checks access on every checked tool call. So a pull lands on the next call. Alation's Agent Builder says agents pick up the platform's fine-grained access rules. We could not find a mid-session pull method 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 proof chain still checks out. Even once the subject is gone. Alation runs the rules and the program around erasure. The wipe itself happens in your source systems. Ask each vendor for the method, not the workflow.
Is Alation Agent Builder generally available, or still in beta?
Worth asking directly. They announced it on 1 October 2025 as a private beta. Press reach put general availability in Q1 2026. A lot got relabelled since then. That includes the AIOS launch in July 2026. Ask which agent features ship today, which sit in beta, and which arrive with your renewal. Our MCP surface has more than 200 tools, across Ontology, Auth, Corpus and Lighthouse. All in production now. You can point a client at it during the trial.
We already run Alation. Does DataShield replace it?
No. Keep it. We don't scan your whole estate. We have one provider kind in general availability. Their glossary and lineage do things ours doesn't. Run us under it, on the datasets agents touch. That's where the duty is enforcement and proof, not description. Most of our talks start with a client who already owns a catalog. They still can't answer an auditor's question with it.
Does DataShield have SOC 2?
Not yet, and we won't imply otherwise. We publish a threat model, and anyone can run the chain verifier. Auth is live, and Guardian and Lighthouse have run in production since April 2026. Design-partner terms include source escrow, so a small vendor isn't a single point of failure. Details on the security page.
- Alation launched AIOS, an "operating system designed to help enterprises govern AI." It bundles 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. Plus 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, and agents enforce it all the time. - 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. Agents automate 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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AllEvery comparison
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