#data-engineering

Clean That Sheet

Online spreadsheet cleaning tool that identifies and fixes messy data in Excel, CSV, and Google Sheets files. Users upload files for a free preview showing detected issues, then pay to unlock fully cleaned versions.

FinBridge

Aggregates Korean and U.S. financial filings, prices, and macro data into one API queryable by AI agents through 33 MCP tools.

pdf-inspector

A free, open-source Rust library that quickly figures out whether a PDF is text-based or scanned and pulls out clean, structured text — so you only pay for expensive OCR on the PDFs that actually need it.

HFlow

An open-source SDK for building robotics data pipelines, managing the collection-to-delivery lifecycle of multimodal sensor data with quality checks and full provenance tracking, backed by Y Combinator.

Hubble

An API that assembles a patient's full medical record across every provider, using EHR connections plus browser and voice agents as fallback.

G Maps Extractor

Type in a search term like "plumbers in Chicago" and get back a spreadsheet of every matching business on Google Maps — names, phone numbers, emails, ratings — instead of manually copying details out of Google Maps one listing at a time.

Polytomic

Data-syncing platform that moves data both ways between a company's warehouse and the everyday tools (Salesforce, Google Sheets, Stripe) that teams actually work in.

Floqer

A tool that automatically fills in the missing blanks in your sales database — company size, job title, whether they just raised funding or started hiring — so your sales team spends time talking to prospects instead of googling them one by one.

Spice AI

A data platform that lets an AI agent or application query all your different databases and data sources with one SQL question — combining search, filtering, and even AI model calls right inside the query — without the usual months-long project of buildin

RealEstateAPI (REAPI)

Developer-facing property data API covering nationwide US real estate records — ownership, valuations, comps, boundaries and skip tracing — for building proptech and fintech products.

Tonic.ai

Generates realistic fake versions of your production data — same shape and statistics, no real customer information — so developers can test against data that looks real without ever touching actual user records.

SuperAnnotate

Data annotation and evaluation platform that turns raw images, video, text and audio into labeled datasets for training and fine-tuning AI models.

Kili Technology

Data annotation platform built for organizations running many labeling projects at once across images, video, text, PDF and geospatial data.

Encord

Platform for labeling, organizing and quality-checking the images, video and sensor data used to train computer vision and robotics AI models.

AutoMQ

Kafka-compatible streaming platform that runs diskless on cloud object storage (S3/GCS/Azure Blob), cutting Kafka's infrastructure cost sharply while keeping full API compatibility.

Artie

Fully-managed change-data-capture platform that streams database changes into data warehouses in real time, without building Kafka/Debezium pipelines yourself.

Hopsworks

Managed feature store and AI lakehouse platform for building production machine-learning systems with millisecond-latency feature serving.

Feast

Open-source feature store that manages the machine-learning data teams use for both model training and real-time predictions.

Estuary

Real-time data movement platform: streaming, log-based CDC and batch through 200+ managed connectors, sub-100ms latency.

dlt (data load tool)

Open-source Python library that moves data from any source into your warehouse, handling schema and normalization for you.