Case Study — Enterprise AI Support

A support platform was paying full
inference cost on 73% of its queries.

Every question their AI answered had likely been answered before. Nobody knew. The bill kept growing.

Enterprise SaaS
AI Customer Support
3.4M+
67%
14 days
01 / Background

The AI support bill no one could explain

A mid-market SaaS platform with 400,000+ users deployed a large language model to handle customer support queries across four product lines. The deployment was considered a success: resolution rates improved, handle times dropped, and CSAT scores climbed.

Twelve months in, the monthly inference bill had grown to $41,000. Engineering flagged it. Leadership asked questions. Nobody had a clear answer because nobody had visibility into what the model was actually being asked.

$41K

Monthly inference cost

Up from an initial projection of $9,200/month at rollout. Cost had scaled 4.5x while query volume had grown 2.1x.

0%

Query visibility

No logging, no categorization, no pattern analysis. Every query was treated as a unique event regardless of content.

$0

Cache hit revenue

The platform had no memory layer. Every query hit the model cold, even questions asked and answered thousands of times before.

02 / The Discovery

What the data actually showed

MEMStorage was integrated in read-only audit mode for 14 days before any routing was activated. The goal was to map the query landscape before touching production traffic.

The first report came back and nobody believed it. Nearly three-quarters of all queries were repeats. The model had answered the same questions tens of thousands of times and charged full price every single time.
Head of Infrastructure, anonymized enterprise client

Query classification — 14-day audit period / 3.4M queries analyzed

Exact repeats (identical queries) 41%
Full inference cost on every single instance
Semantic variants (same intent, different phrasing) 32%
Full inference cost, answer already existed
Novel queries (genuinely new questions) 27%
Full inference appropriate — routed to model
03 / The Solution

Three-tier routing. Zero model changes.

MEMStorage sits above the model as a routing layer. No changes to the underlying AI, no retraining, no new model. Queries are intercepted, classified, and routed in milliseconds before any inference cost is incurred.

Live routing architecture — active queries/month: 3.4M

Tier 1 — Memory Hit

Exact match served from cache

Query matches a stored response with high confidence. Returned instantly with no model call. Covers 41% of all traffic.

$0.00
per query
Tier 2 — Semantic Confirmation

Similar intent, lightweight verification call

Query matches stored response semantically but not exactly. A fast, low-cost confirmation call verifies before serving. Covers 32% of traffic at ~15% of full inference cost.

~$0.003
per query
Tier 3 — Full Inference

Novel query routed to model

Genuinely new question with no close match in memory. Full model call executed and result stored for future routing. Covers 27% of traffic.

$0.021
per query
04 / Results

Month one. Live numbers.

Monthly cost — before $41,200 100% of queries hitting full inference
at $0.021 avg per query
- 67%
Monthly cost — after $13,600 Only 27% of queries reaching the model
Tiers 1 and 2 handling the rest
$27.6K Monthly savings
from month one
67% Inference cost
reduction
<80ms Average response time
Tiers 1 and 2
$331K Projected annual
savings
05 / Deployment

Fourteen days from integration to savings.

Days 1–2

API integration + audit mode activated

MEMStorage connected via API. No traffic routing yet. Query logging and classification begins in the background.

Days 3–9

Query landscape mapping

3.4M queries analyzed, classified, and clustered. Memory populated with high-confidence response pairs. The 73% repeat rate identified and quantified.

Days 10–12

Threshold calibration

Confidence thresholds tuned in staging. Edge cases reviewed. Team validated that Tier 2 semantic responses matched expected quality bar.

Day 14

Live routing activated

Full three-tier routing live in production. First day: 68% of queries intercepted before reaching the model. Cost impact immediate.

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Patent pending · memstorage.com