#44 in AI Development PlatformsUpdated 2026-08

Plasticity

by Plasticity · Natural language processing APIs for text parsing and knowledge queries

34.5 — BenchRank score out of 100

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Overview

Plasticity provides natural language processing APIs for extracting information from unstructured text. Three engines are listed: Sapien for entities, relationships and parsing, Cortex for querying a knowledge graph of 240+ million facts, and Lingua for intent and slot parsing with a natural language response. Access is by HTTP JSON requests, cloud-hosted or deployed on-premise.

Best for: Developers and teams needing NLP APIs to extract entities, relations and intent from text.
Pricing: Free below 1,000 requests a month, then usage-based from $2.00 per 1,000 Sapien requests and $3.00 per 1,000 Cortex requests, dropping to $1.00 and $1.50 above 10M requests a month.
Runs on: WebSelf-hosted

Strengths and trade-offs

Strengths

Free for under 1,000 requests a month
Per-request rates published, falling as volume rises
HTTP JSON API usable from any programming language
Same APIs offered for on-premise deployment

Trade-offs

No self-serve signup; access needs a request form or sales demo
No published price for the Lingua Dialog Engine
On-premise and custom solutions are quoted only through sales
Free use capped at 1,000 requests a month

Pricing

Published plans from Plasticity’s own pricing page, in USD. Usage charges and add-ons may apply on top.

Plasticity pricing tiers, monthly rates in USD
Plan	Monthly	Includes
< 1K requests per month	—per 1,000 requests	Sapien Language Engine: free Cortex Knowledge Graph: free Email support within 24 hours
1K - 500K requests per month	—per 1,000 requests	Sapien Language Engine: $2.00 per 1,000 requests Cortex Knowledge Graph: $3.00 per 1,000 requests Billed on monthly usage
500K - 10M requests per month	—per 1,000 requests	Sapien Language Engine: $1.50 per 1,000 requests Cortex Knowledge Graph: $2.00 per 1,000 requests
> 10M requests per month	—per 1,000 requests	Sapien Language Engine: $1.00 per 1,000 requests Cortex Knowledge Graph: $1.50 per 1,000 requests
On-Premise Solutions	Contact sales	Custom-built NLP products and solutions Any Plasticity API deployed behind your own cloud Arranged by scheduling a demo

How this score is made up

Each dimension is scored out of 100 and combined into the headline score using fixed weights.

MCP support: 0 out of 100
API quality: 0 out of 100
Documentation: 55 out of 100
Agent friendliness: 60 out of 100
Pricing transparency: 100 out of 100
Changelog: 0 out of 100
Marketing site structure: 65 out of 100
Operational trust: 15 out of 100

Measured, but not part of the score

Useful to know, but not a mark for or against the product — so these do not affect the ranking.

Openness: 60 out of 100
Maintenance: 65 out of 100

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