
SignalVault.io
Sentinel SCA
Helicone AI
Polaxis
Guardrly
Langfuse
Microsoft Azure
Portkey
TranscriptFetch
SocialFetch.dev
TranscriptAPI.com
SignalVault sits between your application and AI providers like OpenAI and Anthropic. Every prompt and response flows through SignalVault's proxy, where it's encrypted, scanned for violations, and logged with a complete audit trail. Drop in with two lines of code โ change your base URL or use our Python/Node.js SDKs. No code rewrites, no complex setup.
What it does:
Encrypted audit logging โ every AI interaction is stored with AES-256-GCM encryption. Immutable, tamper-proof, and export-ready for SOC2 and GDPR reviews.
PII detection โ catches emails, phone numbers, SSNs, credit card numbers, and API keys in prompts before they reach the AI provider. Block, warn, or redact automatically.
Secret scanning โ detects API keys, tokens, and credentials leaking through prompts.
Budget controls โ set monthly cost limits and daily token caps per app. Get alerts before spend gets out of control.
Guardrail rules โ configure policies that enforce what your AI can and can't do. Core rules included on all plans, custom rules on Growth.
Mirror Mode โ async logging that stays off the request path. Full visibility with zero latency impact. See what would have been caught without blocking anything.
Built entirely in Elixir on the BEAM for fault tolerance and high concurrency. Dashboard powered by Phoenix LiveView. No JavaScript frameworks.
Pricing is per-app: Starter at $49/month, Growth at $149/month. Free to try with 100 requests, no credit card required. Unlimited logging and compliance exports included on all plans.
TranscriptFetch is one API for getting text out of video and web content.
Send a URL from YouTube, TikTok, Instagram, X or Facebook and get back clean, timestamped text. Send any web page and get clean Markdown. One endpoint, one response shape, one API key.
Most short-form video has no caption track to download. TikTok's auto-captions are opt-in per upload, Instagram never publishes a downloadable track, and a large share of captions on both platforms are burned into the video frames where no parser can read them.
When there is no caption track, TranscriptFetch transcribes the audio instead. Same endpoint, same response, so your code never branches on which method produced the text.
text field for feeding a model or a search indexsegments array with per-cue start times and durations, so subtitles and jump-to-moment links are a formatting step rather than another integration100 free credits on signup, no card required. One credit per successful response. Failed, blocked and empty results are never charged, which matters on short-form video where a meaningful share of any batch is music with no speech in it.
SignalVault.io
TranscriptFetchSignalVault.io's answer
SignalVault is the only AI infrastructure tool built compliance-first rather than routing-first. While other AI gateways bolt on audit logs as an afterthought, SignalVault encrypts every prompt and response with AES-256-GCM from day one, detects PII and secrets in real-time, and provides audit-ready exports on all plans - not just enterprise tiers. Unlimited logging with no log caps on any tier, which competitors like Portkey restrict behind $5K+/month enterprise plans. Built entirely in Elixir on the BEAM for telecom-grade fault tolerance.
TranscriptFetch's answer:
Most short-form video has no caption track to download. TikTokโs auto-captions are opt-in per upload, Instagram never publishes a downloadable track, and many captions on both are burned into the video frames where no parser can read them. TranscriptFetch transcribes the audio when no caption track exists, on the same endpoint, with the same response shape. Your code never branches on which method produced the text. It also covers YouTube, TikTok, Instagram, X and Facebook plus any web page as clean Markdown, so a pipeline spanning several sources is one integration rather than five.
SignalVault.io's answer
SignalVault is actively used in production and onboarding new teams. We offer hands-on integration support to every customer.
SignalVault.io's answer
Most AI gateways focus on routing and model switching. SignalVault focuses on trust and compliance โ the part that matters when a security team asks "what data did we send to the AI?" Three reasons teams choose SignalVault: unlimited logging on every plan (competitors cap logs and stop recording), compliance exports (CSV/JSON) included from day one (competitors gate this behind enterprise pricing), and Mirror Mode for zero-latency async monitoring that shows what would have been caught without blocking requests. Integration takes minutes - use the Python or Node.js SDK, or point your existing OpenAI/Anthropic client at the proxy.
TranscriptFetch's answer:
Three reasons. Coverage: one API key and one response shape across five video platforms and the open web, instead of stitching together a library per platform. Reliability: requests run through rotating infrastructure, so code that works locally keeps working from a server, which is where most open-source approaches break. Billing that matches reality: one credit per successful response, with failed, blocked and empty results never charged. That last point matters on short-form video, where a meaningful share of any batch is music with no speech in it. There is also an MCP server, so AI agents can fetch transcripts as a tool without a custom integration.
SignalVault.io's answer
Developers and engineering teams shipping AI-powered features to real customers who need to prove their AI usage is safe, compliant, and auditable. Especially teams preparing for SOC2, GDPR, or security reviews who can't afford enterprise-only compliance tooling. From solo developers shipping their first AI feature to growing SaaS companies with multiple environments and custom guardrail needs.
TranscriptFetch's answer:
Developers and technical teams building on video and web content. The common cases are RAG and retrieval pipelines that need video as text, AI agents that need to read a link mid-conversation, content teams repurposing short-form video at scale, and media monitoring and research tools. It is an API first, so the buyer is usually the person writing the integration rather than an end user. The free browser tools exist for one-off transcripts and for evaluating output quality before writing any code.
SignalVault.io's answer
I was building AI features into my own products and realized there was no simple way to log what I was sending to AI providers, detect if customer data was leaking into prompts, or show an auditor what happened. The existing tools were either massive enterprise platforms with sales-call pricing or basic observability dashboards with no real compliance story. So I built SignalVault - the trust layer I needed for my own stack. It's designed to be as easy to integrate as Stripe is for payments: change one URL or install the SDK, and every AI request is logged, scanned, and governed.
TranscriptFetch's answer:
It started with discovering there is no good way to get the text of a video. YouTubeโs official Data API will confirm a caption track exists and then refuse to hand it over, because captions.download requires the video ownerโs OAuth token. The popular open-source libraries work until you deploy them, at which point platforms start refusing datacenter IPs. And YouTube is the easy case: TikTok and Instagram publish no caption file at all. Every workaround solved one platform, worked locally, and broke in production. TranscriptFetch is the version that handles the failure cases as first-class behaviour rather than edge cases.
SignalVault.io's answer
SignalVault is built entirely on Elixir and Phoenix with LiveView for a real-time, server-rendered dashboard. The entire stack - proxy, PII detection engine, rule system, and dashboard - is pure Elixir, leveraging the BEAM's fault tolerance and concurrency for high-throughput proxy workloads. PostgreSQL for encrypted audit log storage. Encryption uses AES-256-GCM via Cloak, and API keys are hashed with HMAC-SHA256. Python and Node.js SDKs wrap the OpenAI client for drop-in integration.
TranscriptFetch's answer:
Next.js with TypeScript and Tailwind on the front end and API layer, Clerk for auth with SHA-256 hashed API keys, Neon Postgres with Drizzle ORM, Redis for caching, and Stripe for billing. The extraction layer is a Python and FastAPI service. Speech-to-text uses Whisper-class models. The MCP server is published in the official Model Context Protocol registry with a DNS-verified namespace.
Sentinel SCA - Sentinel SCA is governance infrastructure for AI agents that enforces security policies, records actions in a tamper-evident ledger, and enables forensic replay of autonomous systems.
SocialFetch.dev - Social media scraping API for public profiles, posts, comments, videos, transcripts, and metrics from TikTok, Instagram, YouTube, X, LinkedIn, and more. Pay-as-you-go credits, 100 free to start.
Helicone AI - Open-source LLM Observability for Developers
TranscriptAPI.com - Get YouTube video transcripts with a simple API call or through Model Context Protocol. Fast, reliable, and easy to integrate into your applications.
Polaxis - Runtime security and governance for AI agents. Block threats, enforce policies, require human approval, control spending, and generate one-click SOC 2/GDPR/OWASP compliance reports. Free forever for one agent.
Guardrly - Monitor every API call your AI Agent makes. Guardrly provides real-time alerts, visual audit logs, and PII scrubbing to prevent rogue actions from banning your Meta Ads or Shopify accounts. Know what your agent did before it's too late.