Contrast SecurityContrast Security, founded by OWASP co-creator Jeff Williams, instruments applications with in-app sensors: Contrast Assess (IAST) and Scan (SAST) find vulnerabilities, Contrast SCA flags risky dependencies, and its ADR/RASP layer detects and blocks attacks in production.Application SecuritySelf-hostedCommercial
CoolifyCoolify is a free, open-source PaaS you install on your own server to deploy apps, databases and 280+ one-click services, with an optional $5/month Coolify Cloud convenience tier.Cloud Providers & HostingSelf-hostedOpen source
CoralogixCoralogix provides log, metrics and APM observability built on a streaming analytics architecture that avoids traditional indexed hot storage, with a 14-day free trial and usage-based pricing.Analytics & BISoftwareCommercial
CrowdStrikeCrowdStrike Falcon unifies endpoint protection (EDR/XDR), identity threat detection and cloud security under one lightweight agent, sold in tiers from Falcon Go to Complete.Endpoint SecurityWebCommercial
CSO OnlineCSO Online publishes security-leadership news, analysis and research, produced by Foundry (formerly IDG Communications) alongside sister titles CIO, Computerworld, InfoWorld and Network World.IT News & MediaSoftwareCommercial
DagsterDagster is an open-source Python orchestrator built around software-defined assets. Its creator, Dagster Labs (formerly Elementl), was acquired by Prefect in 2026; the open-source project keeps its license and Dagster+ continues unchanged for existing customers.Data EngineeringSelf-hostedOpen source
DarktraceDarktrace offers separate network, email and endpoint security products for threat detection and response.Endpoint SecuritySoftwareCommercial
DatabricksDatabricks combines data engineering, SQL analytics and machine learning on a lakehouse platform.Data Warehousing & LakehouseSoftwareCommercial
DatadogDatadog collects infrastructure metrics, logs, traces, and other signals so teams can investigate services and configure alerts.Monitoring & ObservabilityWebCommercial
dbtdbt lets analytics engineers transform warehouse data using SQL with version control, testing and documentation; dbt Core is free and open source, dbt Cloud adds managed orchestration.Data Warehousing & LakehouseSelf-hostedOpen source
DetectifyDetectify combines automated DAST scanning with crowdsourced vulnerability research to monitor internet-facing assets and web apps for exploitable issues.Application SecuritySoftwareCommercial
DokployDokploy manages application and Docker Compose deployments on servers through a web interface.Containers & KubernetesSelf-hostedOpen source
DuckDBDuckDB is a free, open-source (MIT) in-process OLAP database you embed directly in an application, with no separate server to run or manage.DatabasesSelf-hostedOpen source
Duo SecurityCisco Duo combines multi-factor authentication with access and device-trust controls.Identity & Access ManagementWebCommercial
DynatraceDynatrace brings application and infrastructure telemetry into an observability platform, with capabilities governed by the selected subscription.Monitoring & ObservabilitySelf-hostedCommercial
ElasticElastic Security brings SIEM and endpoint signals onto the Elasticsearch platform.SIEM & Threat IntelligenceSelf-hostedOpen source
Elastic CloudElastic Cloud is Elastic's hosted Elasticsearch service, offered as fully managed Serverless or resource-based Hosted deployments across AWS, GCP and Azure, covering search, observability and SIEM/security use cases.SIEM & Threat IntelligenceSelf-hostedCommercial
ESETESET offers endpoint protection administered through ESET PROTECT, with detection and response options in selected packages.Endpoint SecuritySoftwareCommercial
EstuaryEstuary Flow combines change data capture (CDC), streaming, and batch ETL into one managed platform with 200+ connectors, letting teams build real-time pipelines for analytics, operations, and AI without stitching together separate tools.DatabasesSoftwareOpen source
FastlyFastly provides a global CDN, WebAssembly-based edge compute (Compute), and application security (WAF, bot management, API security, DDoS protection), with a free tier plus usage-based and flat-rate packages.Network SecuritySoftwareCommercial
FiberyFibery lets teams build custom apps (tasks, docs, CRM-like objects) on one connected workspace, with a free tier for up to 10 users and paid plans from €12/user/month.Project ManagementSoftwareCommercial
FirezoneFirezone is an open-source zero-trust remote-access platform built on WireGuard. Its Starter plan is free for small teams, with paid Team and custom Enterprise plans adding centralized management and support.CybersecuritySelf-hostedOpen source
FivetranFivetran runs managed connections that replicate supported source data into a destination for analytics and downstream processing.Data EngineeringSoftwareCommercial
Fly.ioFly.io runs applications on Fly Machines, with region placement and local persistent volumes for workloads that need storage.Cloud Providers & HostingSoftwareCommercial
Forest AdminForest Admin has rebranded to Forest, an operations platform that connects databases, compliance workflows, and AI agents for regulated companies, with full audit trails. A free sandbox is available; paid plans start at $499/month.DatabasesSelf-hostedCommercial