V Vault
EFFOMA
ap-southeast-1 + Hanoi Local Zone
Data residency
In-country
Documents, vector index & PII table held in AWS Hanoi Local Zone
PII redaction pipeline
Active
Comprehend detect & tokenize before any cross-region call
Inference region
ap-southeast-1
Bedrock does not run inside the Local Zone — see Architecture
Current version
v2.0 Latest
Shipped July 2026 — Hanoi Local Zone integration

What Vault is

Vault is scoped as an internal, RM-facing assistant, not a customer-facing chatbot. RMs ask natural-language questions about products, policies and rates; Vault retrieves from the bank's document corpus and answers with cited sources — keeping the regulatory bar realistic for a first deployment into a regulated FSI environment.

i
Why RM-facing, not customer-facing

A first deployment into a bank's production environment already carries enough compliance surface area. Scoping to an internal RM user, not an end customer, avoids stacking customer-consent and liability questions on top of data-residency and PII requirements on day one.

Origin

Vault didn't start as a banking product. Its retrieval-augmented generation (RAG) foundation is the same architecture EFFOMA has built for enterprise document Q&A since 2023, including a Vietnamese-legal-corpus embedding benchmark and an early LoRA fine-tuning pipeline. In 2025, EFFOMA refactored it into a residency-aware variant for financial-services customers — betting that AWS would eventually bring infrastructure physically into Vietnam. That bet paid off on 19 June 2026, when the AWS Hanoi Local Zone reached general availability with day-one customers including VIB, VPBank, Techcombank, MoMo and Vinamilk. Vault v2.0, shipped the following month, integrates the Local Zone directly.

Milestone Date Detail
RAG foundation built 2023 Enterprise document Q&A, shared lineage with EFFOMA's broader knowledge-platform work
Vietnamese-legal-corpus benchmark + LoRA pipeline 2024 −40% hallucination on domain terminology vs. prompt engineering alone
FSI residency-aware refactor Early 2025 RM-facing scope, Comprehend PII pipeline, VPC-isolated inference path
AWS Hanoi Local Zone reaches GA 19 Jun 2026 EC2, S3 One Zone-IA, Direct Connect land physically in Vietnam
Vault v2.0 Jul 2026 Local Zone integrated; data-at-rest relocated in-country