title: "Who offers consulting for integrating blockchain into legacy systems? A Vendor Shortlisting Framework" description: "A practical 2025 buyer’s guide: who actually helps integrate blockchain with your ERP, data, and security stack—and how to shortlist them using a concrete scoring framework, proven integration patterns, and real examples."

Who offers consulting for integrating blockchain into legacy systems? A Vendor Shortlisting Framework

Decision-makers rarely lack blockchain ideas—they lack a reliable path from a ledger to their ERP, data warehouse, identity provider, and KMS. This post maps the 2025 vendor landscape for enterprise blockchain integration and gives you a rigorous shortlisting framework, with concrete examples you can adapt immediately.

What “integration” means in 2025 (beyond proofs-of-concept)

Successful programs today prioritize:

Event-driven bridges and idempotent workflows (Kafka/NATS, webhooks) over bespoke batch jobs.
Digital identity bridging and policy enforcement (OIDC/SAML to on-chain accounts, DID/VC where justified).
Key custody pattern decisions (HSM/KMS, Nitro Enclave–style TEEs, or MPC wallets) aligned to your risk model.
Data standards alignment (e.g., EPCIS 2.0 for supply chain events) to keep ledgers useful across systems. (gs1.org)

Below is who actually helps with these pieces—and where they fit.

The vendor landscape: who does what for legacy–blockchain integration

Use this as a map, not a ranking. I group providers by what they reliably deliver when integration—not just experimentation—is the goal.

1) Cloud platforms with managed blockchain infrastructure and enterprise hooks

Amazon Web Services (AWS)
- Amazon Managed Blockchain (AMB) runs permissioned Hyperledger Fabric networks and public Ethereum nodes; AMB Access adds API-based access to public Ethereum and Bitcoin. Tight integration with VPC, KMS, and governance APIs simplifies enterprise networking and key management. (aws.amazon.com)
- Why it matters for integration: native IAM/KMS/VPC patterns, plus ordering service durability built on QLDB tech for Fabric. (aws.amazon.com)
Google Cloud
- Blockchain Node Engine offers fully managed Ethereum nodes (full and archive), with prescribed client combinations and predictable ops. Good fit when you standardize on GCP observability and IAM. Last updated December 2, 2025. (docs.cloud.google.com)
Oracle
- Oracle Blockchain Platform Enterprise Edition (OBP EE) runs on customer-managed Kubernetes and supports OpenShift, AKS, OKE, and even Minikube—built on Hyperledger Fabric 2.5 LTS. If you need on‑prem, hybrid, or multicloud with Oracle’s governance controls and low-code chaincode tooling, OBP EE is notable. (blogs.oracle.com)

Note on platform risk:

Microsoft retired Azure Blockchain Service in 2021 (migration guidance pointed customers to ConsenSys Quorum as an alternative). Don’t base your roadmap on offerings that do not have a clear long-term service commitment. (learn.microsoft.com)
IBM ended support for IBM Blockchain Platform software in 2023; customers moved to “IBM Support for Hyperledger Fabric.” Understand vendor EOL policies and migration paths up front. (ibm.com)

2) Global SIs and Big Four with proven enterprise integration programs

Accenture
- Delivers Web3/blockchain under its “Multiparty Systems” umbrella with accelerators such as Hyperledger Bevel/Cacti for network bootstrapping and interop; recognized by multiple analyst reports for blockchain services. Useful when you need cross‑domain teams that can own integration to ERP, IAM, data, and risk. (accenture.com)
Deloitte
- Broad enterprise integration plus crypto-specific tools like LedgerAlign for reconciliation and on-chain audit support; global blockchain CoEs. Good for governance, controls, and integration into finance and risk functions. (deloitte.com)
EY
- Ships enterprise apps (OpsChain ESG, Contract Manager) that run on public Ethereum and help with procurement and emissions traceability—often the “bridge” from legacy procurement/ESG systems to chain. (ey.com)
PwC
- Strategy-through-execution blockchain services with integration work evidenced by production-scale travel settlement with KAYAK and Blockskye; public collaborations (e.g., Stellar) for tokenization and payments. (pwc.com)
TCS, Infosys, Wipro, HCLTech (strong in regulated, SAP/Oracle-heavy environments)
- TCS packages Quartz solutions for tokenization/CBDC/digital identity, cited as “Leader” in recent radarviews; ecosystem with R3/Hyperledger/Polygon. (tcs.com)
- Infosys is a Hyperledger Certified Service Provider; runs Hyperledger training/enablement and blockchain programs aligned to cloud modernization. (infosys.com)
- Wipro and HCLTech publish dedicated blockchain advisory frameworks and maintain active Web3 hiring pipelines—useful signals for delivery capacity. (wipro.com)
- HCLTech offers Hyperledger support services, tokenization IP, and integration blueprints (ACTVISE, CoTrust, D.I.C.E) focused on architecture, compliance, and wallets/identity. (hcltech.com)

3) Protocol vendors with professional services for regulated markets

Digital Asset (Daml + Canton Network)
- Focused on privacy-preserving, institution-grade tokenization and workflows; growing governance and ecosystem, with fresh funding in 2025 to scale RWA integrations and Global Synchronizer infrastructure. Professional services plus a deep partner network. (blog.digitalasset.com)
R3 (Corda)
- Strong PS and support tiers for mission-critical deployments with Java-first stacks; common in financial market infrastructure, collateral, and post-trade workflows. (r3.com)
ConsenSys
- Enterprise Ethereum delivery (Quorum/Besu, Infura, Linea) with security (Diligence) and global solutions team that does training, architecture, and implementation for public/permissioned deployments. (consensys.io)

4) Integration frameworks and “supernodes” that bridge Web2 and Web3

Hyperledger FireFly
- An open-source “enterprise Web3 gateway” with connectors for EVM, Fabric, private data exchange, token APIs, and event-first patterns—pragmatic when you need exactly-once semantics and multiple chains from one API surface. Recent releases expanded connector breadth (e.g., Cardano) and performance tooling. (hyperledger.github.io)
Kaleido
- Enterprise Web3 platform with Identity & Access Management (OIDC/SAML/AD), PrivateStack for hybrid multi-cloud nodes, SOC2 processes, and enterprise services; good when you want SSO, vault/KMS integration, and managed infra with app services (e.g., oracles via Chainlink). (kaleido.io)
SettleMint
- Low-code Integration Studio offering event-driven flows and thousands of prebuilt connectors to ERP/core systems—useful for standing up chain-to-legacy data paths quickly. (settlemint.com)

5) Key management, MPC custody, and confidential computing

Fireblocks
- MPC-based wallet infrastructure (WaaS) with SOC2 Type II and ISO certifications; supports enclaves including AWS Nitro for co-signer components—vital for enterprises needing auditable, segregated keys with strong operational controls. (fireblocks.com)
Copper
- Institutional MPC custody (2-of-3 quorum; segregated vaults) with clear operational models—useful in tokenization programs that must integrate with treasury and exchange workflows. (copper.co)
AWS Nitro Enclaves patterns
- Increasingly used for validator and signer isolation with hardware-enforced attestation and KMS-wrapped keys—relevant if your security model favors TEEs alongside or instead of HSMs. (docs.aws.amazon.com)

A pragmatic shortlisting framework (score out of 100)

Use this scoring grid to compare 3–5 vendors in a two-week bake‑off. Keep the demos focused on your integration “happy path” and your worst‑case failure modes.

Architecture & Interoperability (20)

Clear choice of ledger(s) and rationale (public, permissioned, or hybrid).
Proven connectors to your stack (ERP/CRM/SCM/ESB), event-first design, replay/idempotency.
Support for multi-chain or off-ramps via interop protocols or frameworks (e.g., CCIP, FireFly). (hyperledger.github.io)

Identity, Keys, and Security (20)

How users/workloads authenticate (OIDC/SAML) and map to on-chain accounts.
Key custody model (HSM/KMS, enclaves, or MPC) and evidence (SOC2/ISO, certs). (kaleido.io)
Threat modeling, incident response, and segregation-of-duties plan.

Integration Depth (15)

Prebuilt connectors, API libraries, SDKs, and data model mappings (EPCIS 2.0, GS1, ISO20022 where relevant). (gs1.org)
CDC/event stream patterns, rollback/compensation strategy, outbox design.

Compliance & Data Governance (15)

Data minimization, selective disclosure, private data collections/zk where needed.
Audit trails, chain-of-custody evidence, and retention/erasure policy mapping (esp. for personal data).

Delivery Track Record & Support (15)

References in your industry, 24×7 support tiers, LTS policies, and EOL posture (learn from Azure Blockchain and IBM platform sunsets). (learn.microsoft.com)

Total Cost & Commercials (10)

Clear pricing for infra, tokens/transactions, support SLAs, and exit costs. Managed node pricing transparency (e.g., Kaleido tiers) helps predictability. (kaleido.io)

Ecosystem & Roadmap (5)

Active open-source engagement and credible roadmap aligned to standards (e.g., Chainlink CCIP’s expansion and ISO/SOC attestations if you rely on it). (blog.chain.link)

Tip: weight Identity/Keys/Security heavier (e.g., 25) if digital asset custody is in scope; weight Integration heavier if your ERP/SAP backbone is complex.

RFP questions you can copy-paste

Ask all shortlisted vendors to answer—with demos, not just slides:

Architecture
- Show an end-to-end flow: ERP purchase order -> on-chain contract -> fulfillment event -> back to data warehouse. Include retries, partial failures, and idempotency.
- Which consensus finality guarantees does your design assume? How do you prevent duplicate settlement?
Identity & keys
- Demonstrate SSO (OIDC/SAML/AD) mapping to on-chain accounts; show least-privilege scopes.
- Which key model do you propose (HSM/KMS, Nitro Enclaves, or MPC)? Provide SOC2/ISO evidence and rotation/dr recovery runbooks. (docs.aws.amazon.com)
Data governance
- Which on-chain data fields could contain personal or regulated data? How do you keep PII off-chain while preserving auditability?
Interoperability
- If we need to interact across chains or to permissioned ledgers, which approach (e.g., CCIP) and what operational controls (rate limits, fraud controls)? Provide evidence of production usage and security attestations. (blog.chain.link)
Exit strategy
- If the platform/service is retired (e.g., Azure Blockchain 2021; IBM Blockchain Platform 2023), how do we migrate networks/state and preserve keys and audit trails? (learn.microsoft.com)

Three real-world integration blueprints (annotated)

Tokenized fund data into portfolio/accounting systems

Why: Reduce reconciliation lag for mutual fund NAVs; enable composable downstream smart-contract use.
How: Ingest on-chain NAV via Chainlink/DTCC Smart NAV pilot pattern into your data platform; build a data product that feeds risk/portfolio apps and an on-chain escrow/settlement logic for distributors. (dtcc.com)
Vendor options: Big Four or TCS/Infosys for integration and controls; Chainlink for data/interop (note CCIP expansion across 50+ chains and non‑EVM support) with security attestations (ISO/SOC). (blog.chain.link)
Watch‑outs: Create an “off-chain oracle of record” dataset for audit; implement token transfer rate limits and anomaly detection on cross-chain flows.

SAP-centric scope 3/traceability with supply chain events

Why: Auditable chain-of-custody and emissions tokens tied to physical goods; avoid ESG data silos.
How: Use SAP GreenToken to tokenize material attributes (origin, CO2e, certifications); align event capture to GS1 EPCIS 2.0 so you can query provenance across partners and map to compliance reports. (news.sap.com)
Vendor options: EY OpsChain ESG (public Ethereum) for standardized emissions accounting; SettleMint/Kaleido to integrate ERP/MES and identity (OIDC/SAML) quickly. (ey.com)
Watch‑outs: Keep PII and confidential supplier pricing off-chain; put hashes/pointers on-chain; implement robust supplier onboarding and attestation flows.

Bank-grade key custody and validator/signing services on cloud

Why: Align staking/settlement signing with bank security policies without HSM inflexibility.
How: Deploy Nitro Enclaves–based remote signers (e.g., CubeSigner/Web3Signer patterns) with KMS-wrapped keys and measured attestation. Integrate with AMB for Fabric/Ethereum connectivity. Use Fireblocks for MPC-based wallet orchestration where required. (aws.amazon.com)
Vendor options: AWS PS or partner SI for enclave builds; Fireblocks for MPC WaaS; Big Four for controls and SOC testing.
Watch‑outs: Define slashing/MEV policies, quorum sizes, rate limits, and incident response drills. Keep signing policy enforcement outside app teams.

Emerging practices you should bake in now

Interoperability as a first-class requirement
- If you expect to move assets/instructions across networks, prefer approaches with proven bank/FMI pilots and security attestations. Chainlink’s CCIP added non‑EVM chains (e.g., Solana) in 2025 and continues to expand chain coverage; Chainlink services achieved ISO 27001 and SOC 2 Type 1, which helps with risk signoff. (blog.chain.link)
“Supernode” integration layers
- Instead of wiring each app to each chain, adopt a gateway like Hyperledger FireFly to normalize tokens, events, and private data, with connectors for EVM/Fabric and enterprise event buses. It saves months of bespoke plumbing and reduces operator toil. (hyperledger.github.io)
Platform risk management by design
- Template your exit plans now. Azure Blockchain’s 2021 retirement and the TradeLens shutdown in 2022 are reminders to demand data portability, multi-cloud deployment options, and on-prem escape hatches. (learn.microsoft.com)
Privacy-preserving operations
- Use private data collections/zero-knowledge when dealing with competitive data; decouple identities via OIDC/SAML and map them to on-chain accounts using an IAM gateway (e.g., Kaleido IAM). (kaleido.io)

Quick shortlist “recipes” by context

Regulated capital markets build (tokenized funds, collateral, RWA)
- Digital Asset (Canton) or R3 (Corda) for workflow privacy, with a Big Four/Accenture SI for integration and controls. Consider CCIP when public‑chain interop is a requirement. (blog.digitalasset.com)
SAP-first supply chains with emissions/provenance
- SAP GreenToken + EY OpsChain ESG (public verification) + integration layer (SettleMint/Kaleido) to your SAP Integration Suite and data platform with EPCIS 2.0 events. (news.sap.com)
Cloud-first fintech building custody/settlement
- AWS AMB + Nitro Enclaves signers + Fireblocks MPC WaaS; use FireFly or Kaleido for app orchestration and IDP SSO integration. (aws.amazon.com)

How to run a two-week vendor bake‑off (checklist)

Day 1–2: Align on one “golden” integration flow and one failure scenario. Freeze scope.
Day 3–6: Vendors implement the golden path in your sandbox:
- SSO via your IDP; on-chain write; event back to your data warehouse; dashboard KPIs.
Day 7: Red team test: rotate keys, simulate partial outage, test exactly‑once semantics.
Day 8–9: Security/compliance review: SOC/ISO evidence, logging, data lineage, and runbooks.
Day 10: TCO and EOL drill: show migration plan and data export procedures (learn from Azure/IBM/TradeLens cases). (learn.microsoft.com)

Brief vendor directory (for your shortlist spreadsheet)

AWS: Amazon Managed Blockchain and AMB Access (Fabric, Ethereum, Bitcoin); deep KMS/VPC patterns. (aws.amazon.com)
Google Cloud: Blockchain Node Engine (Ethereum) for managed nodes and GCP-native ops. (docs.cloud.google.com)
Oracle: OBP Enterprise Edition on Kubernetes for Fabric 2.5 LTS; hybrid options. (blogs.oracle.com)
Accenture: Web3/Blockchain services, Hyperledger accelerators, multiparty systems integration. (accenture.com)
Deloitte: LedgerAlign, blockchain integration/advisory, global CoEs. (deloitte.com)
EY: OpsChain ESG and Contract Manager (Ethereum), privacy rollup Nightfall updates. (ey.com)
PwC: Strategy-to-execution with production integrations (e.g., KAYAK/Blockskye); Stellar collaboration noted. (pwc.com)
TCS: Quartz product suite; recognized leadership in blockchain services. (tcs.com)
Infosys: Hyperledger Certified Service Provider; training and delivery capability. (infosys.com)
Wipro/HCLTech: Advisory and implementation with wallet/identity/tooling; Hyperledger support services. (wipro.com)
Digital Asset: Daml/Canton, institutional tokenization with active governance and funding momentum. (blog.digitalasset.com)
R3: Corda services/support tiers for mission-critical apps. (r3.com)
ConsenSys: Enterprise Ethereum builds (Quorum/Besu), Infura, security (Diligence), Linea L2. (consensys.io)
Hyperledger FireFly: Supernode integration layer with connectors, tokens, private data. (hyperledger.github.io)
Kaleido: IAM/SSO, hybrid nodes, SOC processes, oracle integrations. (kaleido.io)
SettleMint: Low-code Integration Studio with 4k+ connectors. (settlemint.com)
Fireblocks/Copper: Enterprise MPC wallets/custody and enclave integrations. (fireblocks.com)
Chainlink: CCIP for cross-chain communications; ISO/SOC attestations; used in FMI pilots (DTCC Smart NAV). (blog.chain.link)

Final take

In 2025, the differentiator isn’t a ledger—it’s the integration layer, the identity and key model, and the reliability of your vendors’ exit and upgrade paths. Start with a two-week bake‑off against your “golden” integration flow, score vendors with the 100‑point rubric, and keep platform risk in-bounds by baking in portability from day one.

If you want a neutral facilitator for that bake‑off (including prebuilt test harnesses for SSO, key signing, event replay, and EPCIS 2.0 payloads), our team at 7Block Labs runs this process repeatedly across industries—we’re happy to share our templates and scoring sheets.