RAG Development Services by Alpha Expansion
RAG Development01Cited answers02Permission-aware search03Measured qualityBook a call

RAG Development Services

Answers drawn fromyour own documents

We build retrieval systems that let people ask questions of company documents and receive answers with sources, respecting who is allowed to see what and saying so plainly when the documents hold no answer.

Cited answersPermission-aware searchMeasured quality
Cited answers
Permission-aware search
01Our Approach

A knowledge assistant earns trust when it shows its sources, respects every permission and admits what it could not find.

02Overview

Answers drawn from your own documents

  • 01Cited answers
  • 02Permission-aware search
  • 03Measured quality

Retrieval-augmented generation, usually shortened to RAG, connects a language model to your content. A question is matched to the most relevant passages, and the model writes an answer from those passages with links back to them. We build the ingestion, indexing, retrieval and answer layers, and the evaluation that shows whether the system is finding the right material.

It suits organizations whose knowledge is spread across drives, wikis, tickets and policy files, where staff or customers lose time searching. The same foundation powers enterprise knowledge search, support assistants and research tools. It does not suit questions that need calculation over structured records, which belong to a database query, and we separate the two early.

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03What We Do

Capabilities, End to End

01
Content ingestion

Connectors pull documents from drives, wikis, help desks and databases, extract text from files and scans, and keep the index in step as content changes.

02
Retrieval tuning

Keyword and semantic search are combined, results are reranked and passages are sized for the content, with each change measured against real questions.

03
Access control inheritance

The index carries the permissions of the source systems, so a person can only receive answers drawn from documents they are allowed to open.

04
Cited answers

Every answer links to the passages it used, which lets readers verify a claim in one click and lets you trace a poor answer to its cause.

05
Refusal behavior

When retrieval finds nothing reliable, the system says it does not know and suggests where to look, instead of composing a confident guess.

06
Evaluation and freshness

A question set with known answers scores retrieval and answer quality on every change, and monitoring flags sources that have gone stale or stopped syncing.

04In Production

What It Looks Like When It Ships

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Cited answers
Permission-aware search
Measured quality
Source linksPermission checkHonest refusalQuality scores
05What You Receive

Handed Over, Ready to Run

SCROLL
01
Connected content sources
02
Search index with permissions
03
Retrieval and reranking pipeline
04
Answer interface with citations
05
Evaluation set and scores
06
Sync and freshness monitoring
07
Feedback and review tools
08
Documentation and source code
06How It Runs

From Kickoff to Launch

01
Map the knowledge
02
Build retrieval first
03
Add the answers
04
Evaluate and release
01
Map the knowledge

We list the sources, their owners, formats, volumes and access rules, collect real questions from the people who will use the system and agree what a correct answer looks like.

02
Build retrieval first

Ingestion and search are built and measured before any answer is generated, since most poor answers come from the wrong passages being found and not from the model.

03
Add the answers

The model is given the retrieved passages and firm instructions on citing, refusing and staying within the sources, and the interface is built to show the evidence beside every answer.

04
Evaluate and release

The system is scored on the question set, tested by a pilot group whose feedback is logged, tuned where it falls short and then opened to more users with monitoring in place.

07Technology

The Stack We Use

RetrievalpgvectorElasticsearchOpenSearchPineconeQdrantPipelinesLlamaIndexLangChainUnstructuredTemporalRetrievalpgvectorElasticsearchOpenSearchPineconeQdrantPipelinesLlamaIndexLangChainUnstructuredTemporal
ModelsOpenAI APIAnthropic APICohere RerankAmazon BedrockEvaluationRagasLangfusePromptfooOpenTelemetryModelsOpenAI APIAnthropic APICohere RerankAmazon BedrockEvaluationRagasLangfusePromptfooOpenTelemetry
08Who It Is For

Built for Teams Like Yours

FLAGSHIP
The answer exists but nobody can find it

Policies, procedures, contracts and past answers sit in several systems, and people ask a colleague because searching takes too long. A general chatbot cannot see your documents and should not see all of them. You want answers from your own content, with sources and permissions respected.

Enterprise knowledge search
Support answer assistants
Policy and procedure lookup
Contract and document research
Technical documentation search
Onboarding question desks
09Questions

What buyers ask before they start

If yours is not here, ask us directly. The first conversation is free and useful whether or not we work together.

Book a call

RAG stands for retrieval-augmented generation. The system searches your content for passages relevant to a question and a language model writes the answer from them. It is the right approach when answers live in documents that change, when sources must be shown and when access differs between people. It is less suited to arithmetic over records or to tasks that need no company knowledge.

Permissions are applied at retrieval, before the model sees anything. The index stores who may open each document, taken from the source system, and every search is filtered by the identity of the person asking. A passage the user cannot open is never retrieved, so it cannot appear in an answer. We test this with accounts that hold different rights.

With a set of real questions that have agreed correct answers and known source documents. Each change is scored on whether the right passages were retrieved, whether the answer is supported by them and whether it addresses the question. People also rate answers in use, and low ratings feed back into the set. Quality is reported as figures over time.

The system should say so. We instruct and test it to decline when retrieval returns nothing relevant or the passages conflict, and to point the person to an owner or a search instead. Refusals are logged, since a cluster of unanswered questions shows exactly which content is missing. An assistant that always answers is one that sometimes invents.

It is the same foundation used in two ways. Knowledge search returns ranked documents and passages for people to read. A RAG assistant goes one step further and writes an answer from them. Both depend on good ingestion, relevance, permissions and fresh content. Many organizations start with search, prove that retrieval works and then add generated answers on top.

10Related services

Often built together

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Premium digital product and engineering studio. We build high-performance web platforms, SaaS applications, mobile apps, and 3D experiences for high-growth companies.

Alpha Expansion is a premium digital product and engineering studio specializing in React development, Next.js development, full-stack development, mobile app development, UI/UX design, and 3D interactive experiences.

We serve industries including SaaS, FinTech, Healthcare, E-commerce, Logistics, and Real Estate.