# MongoDB, Inc. (MDB) — InvestMoat Analysis

_Last analyzed: September 5, 2026_
_Asset class: equity · Canonical page: https://investmoat.com/stocks/mdb_

## Scores

| Dimension | Score (0–100) |
| --- | --- |
| Moat durability | 59 |
| Growth trajectory | 80 |
| Valuation | 64 |
| **Composite** | **67** |

Scores are computed deterministically from this asset’s data by the InvestMoat formula (see https://investmoat.com/llms.txt for methodology). Scores are not directly comparable across asset classes.

## Key stats

- **Ticker:** MDB
- **Market Cap:** ~$35B

## Moat

MongoDB is the leading document database (NoSQL) standard with Atlas as a fully managed multi-cloud platform, plus growing AI-era relevance via integrated vector search and Voyage AI embedding/reranking models — but faces narrowing developer mindshare against PostgreSQL extensions and cloud-native vector databases.

### The Document Database Standard (Under Pressure)

MongoDB's moat is real but contested — built on **Developer Standard, Atlas Multi-Cloud, and Vector AI Integration**:

- **Document Database Standard for JSON Workloads:** MongoDB is the de facto standard for document/JSON workloads with millions of developers and a deep ecosystem of drivers, ORMs, and frameworks. For applications with flexible schemas, nested documents, and rapid iteration, the developer experience remains best-in-class. Q2 ended with more than 70,600 customers (+18% YoY; +2,900 in the quarter) and 2,999 customers at $100K+ ARR (+17%).
- **Atlas Multi-Cloud Managed Service:** Atlas runs on AWS, Azure, and GCP with single-pane multi-region replication, backup, and security. Atlas grew 29% YoY to $565.9M in Q2 and is ~73% of subscription revenue — the same rate as Q4 FY2026, not the AI-driven acceleration the stock had priced. Consumption is still the growth engine; it is not a new slope.
- **Voyage AI Integration & Vector Search:** Q2 put Search and Vector Search into Enterprise Advanced (same APIs on-prem and in Atlas), launched Atlas Managed MCP Server for coding agents, and GA'd Automated Embeddings, the Embedding/Reranking API, voyage-code-4, and Vector Search in Atlas Stream Processing. That is the unified data + retrieval pitch shipping. It is not yet a disclosed Atlas mix shift — management called AI 'early momentum,' and the market sold the stock ~12–14% after hours because Atlas stayed at +29%.
- **Enterprise Advanced Is Not Dead:** EA & other grew 36% YoY, outpacing Atlas, against a May card that had license in secular single-digit decline. Self-managed and hybrid demand — now with the same vector/search stack — is the other half of 'run anywhere.' PostgreSQL pgvector and DocumentDB/Cosmos remain the competitive set for new application starts.

**Moat verdict:** Q2 does not change moat statuses: MongoDB remains a real but narrowing document-database standard with a credible AI retrieval attach. What moved is the growth evidence — 30% revenue, FY27 ~+22% instead of 16–18%, RPO +91%, EA +36% — and the market's refusal to pay an AI-platform multiple for Atlas still at +29%. Next trip is Q3 $756–$761M. A miss there, not a moat downgrade, is how the after-hours read gets confirmed.

## Growth

Q2 FY2027 (ended July 31, reported Sep 1) printed revenue $771.8M (+30% YoY) and non-GAAP EPS $1.90, beating ~$735M / $1.62 and the company's $729–$734M guide. Atlas $565.9M (+29%); EA & other +36%; subscription +31%. RPO $1.52B (+91%), cRPO $797M (+73%). Non-GAAP operating margin 24% (from 15% a year ago); FCF $137.6M (nearly doubled). Third consecutive GAAP-profitable quarter ($40.9M / $0.50). Q3 guided $756–$761M / $1.57–$1.61 (~+21% YoY at the midpoint). FY27 raised to $2.99–$3.03B (~+22%) and non-GAAP EPS $6.39–$6.58 — the May 16–18% deceleration thesis did not happen. Close $434.21 on Sep 1; after-hours ~$382 on the Atlas-didn't-accelerate read.

- **Revenue CAGR estimate:** 18-22%
- **Primary type:** TAM expansion
- **Margin trend:** expanding
- **Key risk (high):** Q3 is guided to ~+21% and Atlas printed +29% for a second consecutive comparable period. If Q3 misses $756–$761M, FY27 cuts below $2.99B, or Atlas stays stuck in the high-20s while PostgreSQL pgvector takes new AI/RAG starts, the ~11× FY27 sales multiple compresses toward 7–8×.
- **Drivers:**
  - Atlas (Managed Cloud DB) — Q2 $565.9M (+29% YoY), ~73% of subscription — same rate as Q4 FY2026, not an AI inflection (stable)
  - Vector Search & Voyage AI — Vector Search now in EA; Managed MCP Server; Automated Embeddings + reranking GA. Unquantified in Atlas mix; 'early momentum' (accelerating)
  - Enterprise Advanced & other — +36% YoY in Q2 — on-prem/hybrid outgrew Atlas. May card had this in secular decline (accelerating)
- **Score derivation:** Base 83 (18–22% CAGR mid 20%) + 3 trajectory (EA and vector/AI accelerating; Atlas stable at +29%) + 4 margin (non-GAAP OM 15% → 24%; FCF nearly doubled) − 10 high (Q3 +21% and Atlas not inflecting on AI) = 80

## Valuation

At the Sep 1 close of $434.21 (~$35B on ~80.5M shares) MDB trades at ~11.5× FY27 midpoint sales (~$3.01B) and ~67× midpoint non-GAAP EPS ($6.48). After-hours ~$382 is ~10.3× sales / ~59× earnings — closer to the $430 base. The May 16–18% / ~9× setup is stale: growth re-accelerated and the stock re-rated, then gave back the AI-premium on the print. Consensus 12-month target was ~$449 into the report.

| Multiple | Value | Note |
| --- | --- | --- |
| Trailing P/E (GAAP) | elevated | Q2 GAAP EPS $0.50; TTM still SBC-heavy. Third straight GAAP-profitable quarter |
| Forward P/E (FY27, non-GAAP) | ~67× | Close $434 / ~$6.48 midpoint; ~59× on the ~$382 after-hours print |
| PEG Ratio | ~3.3× | 67× ÷ 20% blended CAGR — still elevated for a database compounding in the low-20s |
| Price / Sales (FY27) | ~11.5× | ~$35B / $3.01B midpoint; ~10.3× at ~$382 AH |
| Price / FCF | ~60×+ | Q2 FCF $137.6M; not yet a 20%+ FCF-margin story at this run-rate |

The beat-and-raise was real (30% growth, FY27 to ~$3.01B, RPO +91%). The multiple is still a claim that Atlas inflects on AI. After-hours priced the gap between that claim and a +29% Atlas print. Next trip is Q3 $756–$761M — a ~+21% quarter that has to land for ~11× sales to hold. _(as of September 2, 2026)_

## Price scenarios

### Bear — $250

Q3 misses, Atlas stays in the mid-20s, PostgreSQL pgvector keeps new AI starts, and the multiple compresses toward 7× FY28 sales.

- Q3 lands below $756M or FY27 cuts under $2.99B; Atlas decelerates through 25%
- Vector/Voyage stays an attach story inside the existing base rather than a mix shift
- Multiple compresses to ~7× sales as the AI-data-platform narrative fades

### Base — $430

FY27 lands ~$3.01B / ~$6.50 EPS, Q3 converts, Atlas holds high-20s, and the multiple settles ~11× as EA + vector keep the install base expanding.

- FY27 revenue ~$3.01B (+22%); Q3 in the $756–$761M range; non-GAAP OM stays ~20%+
- Atlas holds ~28–30% with EA still contributing; $100K+ customers keep compounding off 2,999
- RPO growth cools from +91% but stays well ahead of revenue; multiple holds ~11× FY27 sales

### Bull — $580

Atlas Vector Search becomes a disclosed mix shift, FY28 re-accelerates toward the mid-20s, and the multiple expands toward 14× as MDB is treated as an AI data platform.

- Atlas inflects above 30% as Voyage/MCP/vector workloads show up in consumption
- FY28 revenue grows 22%+ and non-GAAP margin pushes through the mid-20s
- Multiple rerates toward 14× sales; large-cap acquirer interest is a floor, not the thesis

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