Reliability for AI Agents

Nella gives your coding agent real codebase understanding, persistent context, and grounded search. Scalable, reliable, enterprise-ready.

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Features

Everything your agent needs.

Fully interactive through an API or MCP.

RAG & INDEXING

Ground every answer in real code.

AST-aware chunking, hybrid semantic + BM25 search, and code verification. Agents reference actual exports — not imagined ones.

ASSUMPTION TRACKING

Catch contradictions before they ship.

Record assumptions about the codebase with auto-invalidation. When related files change, stale assumptions are flagged instantly.

DEPENDENCY TRACKING

Detect drift before it breaks you.

Hash-based dependency monitoring catches package.json and lockfile changes between sessions. Affected assumptions are auto-invalidated.

PROMPT INJECTION DEFENSE

Search results your agent can trust.

5-layer defense system that protects your agents from prompt injection attacks in search results. Structural boundary isolation, content scanning, trust classification, session tokens, and heuristic scoring — all automatic.

ARCHITECTURE GRAPH

Map your codebase as architecture.

One command generates interactive C4 diagrams from your indexed code — file dependencies, directory structure, external packages, and circular dependency detection.

And That's Not All

7 MCP tools. 7 CLI commands. 30+ API endpoints. Here's what else ships in the box.

Hallucination Prevention

Verify generated code against your index — catch fake imports, phantom APIs, and wrong signatures.

Multi-Workspace

Manage 50 projects with hot-swapping, file watching, rolling backups, and schema migrations.

Context Sharing

SQLite-backed cross-agent sharing with channels, versioning, encryption, and pub/sub transport.

Auto-Configure

One command configures Claude Desktop, VS Code, and Cursor. No manual JSON editing.

Benchmark Suite

Score agents on correctness and code quality with standardized tasks and reproducible evaluation.

REST API

Endpoints for search, workspaces, context, and auth. Zod validation, plan gating, WebSocket.

Trust Chain

Carry session continuity across tool calls with heartbeat challenges, context state, and integrity guidance.

Dependency Tracking

Monitor dependency drift across your project. Detect version conflicts and breaking changes automatically.

Everything You Need for Safe Agent Code

Codebase intelligence for the AI coding era. Nella grounds agents in real code.

RAG & INDEXING01/05

Ground every answer in real code.

nella_index builds an AST-aware index of your codebase with hybrid semantic + BM25 lexical search. nella_search finds exactly the code your agent needs — no hallucinated imports or phantom APIs.

agent output

> nella_index
  workspace: ./my-project

## Indexing Complete
  Files:   342 indexed
  Chunks:  1,847 (AST-aware)
  Vectors: 1,847 embedded

> nella_search
  query: "user authentication"

  1. src/auth/login.ts    0.94
  2. src/middleware/auth.ts 0.87
  3. src/models/user.ts    0.81

# ✓ Grounded in real code

With vs Without Nella

See the difference a reliability layer makes for your AI coding workflow.

Without Nella

With Nella

Code Understanding

Agent guesses at project structure

AST-indexed codebase with hybrid search

Code Understanding

Agent guesses at project structure

AST-indexed codebase with hybrid search

Assumption Tracking

Forgotten decisions cause contradictions

Recorded assumptions with auto-invalidation

Assumption Tracking

Forgotten decisions cause contradictions

Recorded assumptions with auto-invalidation

Audit Trail

None or scattered logs

Full JSONL logs with artifacts

Audit Trail

None or scattered logs

Full JSONL logs with artifacts

Dependency Awareness

Package changes go unnoticed

Hash-based drift detection with alerts

Dependency Awareness

Package changes go unnoticed

Hash-based drift detection with alerts

Codebase Search

Agent guesses at code structure

Semantic + lexical search over real code

Codebase Search

Agent guesses at code structure

Semantic + lexical search over real code

Agent Support

Single vendor lock-in

Works with any agent

Agent Support

Single vendor lock-in

Works with any agent

Prompt Injection Defense

Search results can contain injected instructions

5-layer defense with boundary isolation & scoring

Prompt Injection Defense

Search results can contain injected instructions

5-layer defense with boundary isolation & scoring

Codebase Understanding

Hallucinated APIs and imports

AST-indexed code with verification

Codebase Understanding

Hallucinated APIs and imports

AST-indexed code with verification

Cross-Session Context

Lost between conversations

Persistent assumptions & change ledger

Cross-Session Context

Lost between conversations

Persistent assumptions & change ledger

Cloud Sync

Local-only, single machine

Encrypted sync across devices

Cloud Sync

Local-only, single machine

Encrypted sync across devices

Access Control

Open to all, no audit trail

API keys, rate limits, audit logs

Access Control

Open to all, no audit trail

API keys, rate limits, audit logs

Multi-Project

Re-initialize for each project

50 workspaces with hot-swap LRU cache

Multi-Project

Re-initialize for each project

50 workspaces with hot-swap LRU cache

Agent Evaluation

No way to compare agents

Benchmark suite with 8 scored metrics

Agent Evaluation

No way to compare agents

Benchmark suite with 8 scored metrics

Simple, transparent pricing

Start free and scale as you grow. Every plan includes core safety features.

MonthlyAnnualSave 17%

Free

For individual developers getting started with Nella.

$0/forever

5,000 requests / month
1 project
Premium search (hybrid + reranking)
Full RAG indexing (1 workspace)
Context & assumption tracking
Code verification
Dependency monitoring
Dedicated support
3-day log retention

Get Started

Starter

For hobbyists and solo builders shipping their first app.

$9/mo

25,000 requests / month
3 projects
Premium search (hybrid + reranking)
Full RAG indexing (3 workspaces)
Context & assumption tracking
Code verification
Dependency monitoring
Dedicated support
7-day log retention

Get Started

Pro

For developers who need more power and flexibility.

$29/mo

100,000 requests / month
10 projects · 5 members
Premium search (hybrid + reranking)
Full RAG indexing (5 workspaces)
Code verification
Context tracking (30-day)
Dedicated support
30-day log retention

Get Started

Team

For teams collaborating on production applications.

$49/mo

500,000 requests / month
Unlimited projects · 50 members
Premium search (hybrid + reranking)
Full RAG indexing (unlimited)
Code verification
SSO integration
Audit logs & analytics
Slack & webhook alerts
Dedicated support
90-day log retention

Get Started

Need extra requests?

Purchase credit packs for additional API requests beyond your plan quota. Credits never expire.

25K Credits

25,000 requests

$0.20 per 1K requests

Popular

100K Credits

100,000 requests

$18

$0.18 per 1K requests

Best Value

500K Credits

500,000 requests

$79

$0.158 per 1K requests

Start Securing Your Agent Code

Add Nella to any MCP-compatible agent with a single command. 7 MCP tools, 7 CLI commands, instant reliability.

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17 MCP tools