25+
Company rules
23+
People rules
Instant
Real-time alerts
Track any change on companies and people
Get alerted when companies hire, post a new job, launch, raise a round, grow revenue, or when prospects get promoted, change jobs, make a LinkedIn post or comment, or a Twitter/X post or comment. Always-on monitoring with instant webhook notifications.
The best companies grow with Fiber AI
Rule catalog
45+ tracking rules
Monitor companies and people across every dimension that matters for your sales pipeline.
Company Rules
25Headcount
Headcount crosses threshold
Headcount growth %
PopularEmployee count milestone
ExclusiveFunding
New funding round
PopularFunding stage changed
ExclusiveAcquired another company
ExclusiveHiring
Job posting with keyword
Job posting in function
Recently hired with title
PopularDepartment size threshold
News
News mentioning keyword
Any company news
Locations
HQ location changed
ExclusiveNew office location
ExclusiveProfile
Company status changed
ExclusiveCompany name changed
ExclusiveCompany description changed
ExclusiveCompany went inactive
ExclusiveCompany logo changed
ExclusiveTechnology
Technology added
PopularExclusivePosts & followers
Company posted
Company posted with keyword
Follower count grew
ExclusiveInvestors
New investor
ExclusiveLayoffs
Recent layoffs
ExclusivePeople Rules
23Career
Changed company
PopularTitle changed
ExclusiveStealth status changed
ExclusiveOpen to work toggled
PopularExclusiveIs hiring toggled
ExclusiveGot promoted
PopularStarted a company
ExclusiveEmployment type changed
ExclusiveGot demoted
ExclusiveStuck in role
ExclusiveProfile
Headline changed
ExclusiveLocation changed
ExclusiveSummary changed
ExclusiveNew certification
ExclusiveBecame verified
ExclusiveSkills & tags
Tag gained
ExclusiveSkills added
ExclusivePosts
Person posted
Posted with keyword
PopularReacted to a post
ExclusiveCommented on a post
ExclusiveNetwork
Connections milestone
ExclusiveFollower milestone
ExclusiveStripe
company
Raised $6.5B Series I round
Investors
Example payload
{"entity": {"type": "company","name": "Stripe","domain": "stripe.com"},"rule": "new_funding_round","summary": "Raised $6.5B Series I round","changeData": [{"type": "series_i","amountUsd": 6500000000,"date": "2025-01-13","investors": ["Sequoia Capital","Andreessen Horowitz","GIC"]}]}
Nobody else has this
— not on any competitor
Delivery
Webhook Alerts with full context
Every alert arrives with full context — ready to act on immediately. No extra steps, no chasing down details.
alert payload
{"entity": {"type": "company","name": "Stripe","domain": "stripe.com"},"rule": "new_funding_round","summary": "Stripe raised a $6.5B Series I round","changeData": [{"type": "series_i","amountUsd": 6500000000,"date": "2025-01-13","investors": ["Sequoia Capital", "Andreessen Horowitz", "GIC"]}]}
Instant delivery
Every alert includes the full story — what changed, who's involved, and why it matters. No extra lookups needed.
Never miss an alert
Built-in retries and deduplication ensure every alert reaches your systems — even during temporary outages on your end.
You control the frequency
Check daily, weekly, or monthly — you choose the pace. Pay only for what you monitor.
Spot trends over time
Compare today's data against snapshots from up to 90 days ago. Catch slow-building changes your competitors miss.
Pricing
Simple, transparent pricing
Pay only for what you monitor — per entity, per check. No seats, no minimums. Volume and frequency discounts built in.
Companies or people tracked
* Discount available with 10k+ entities
Check frequency
* Discount available for daily checks
Unlimited rules included
Job changes & promotions
Headcount & growth
Funding rounds & investors
Hiring & job postings
LinkedIn posts & comments
Company profile changes
Technology stack changes
Layoffs & departures
40+ more rules
Estimated cost
$40 / month
2,000 credits / month
Rate: 2 credits per entity, per check
Track 10k+ entities or check daily to unlock a discount.
The more you track and the more often you check, the less you pay per entity.
Standard
2
credits / entity / check
Any list size, checked monthly or weekly.
Scale
50% off1
credit / entity / check
10,000+ entities OR daily checks.
Bulk
75% off0.5
credits / entity / check
10,000+ entities AND daily checks.
NOBODY else has all of these tracker rules. And for the 2 competitors that have a few of them, we are more than 10x cheaper.
Example: tracking 1,000 people checked weekly is 2,000 credits / week.
At scale, 10,000 checked daily drops to 150,000 credits / month.
Your data, your way
Consume alerts however you work
Push, pull, or browse — get the same rich alerts through whichever channel fits your stack.
Webhooks
Get alerts pushed to your systems the moment something changes — ideal for triggering workflows in your CRM, Slack, or outbound tools in real time.
In-app dashboard
Browse and triage every alert right inside Fiber. Filter by list, rule, or entity — no engineering required to get started.
API & polling
Pull alerts and changes on your own schedule with simple REST endpoints. Sync into a data warehouse or build your own experience on top.
Stories from teams that run on our APIs
Fiber AI
850M+ people
2.5x more than CrustData
350M people
Start small or scale fast.
Fiber AI grows with you.
Flexible, growth-ready pricing to power outbound sales, staffing, AI agents, or whatever your superpower is.
Fiber AI
Live data APIs
PDL doesn’t have real-time APIs
Stale Data
Monthly
Yearly (Save 17%)
Includes:
15,000 credits per month
Only pay for successful calls (data found)
Credits usable for reverse email lookup, CRM enrichment, AI search, etc.
Complete API access including our reverse email lookup, contact enrichment, live fetch etc. endpoints
Includes:
50,000 credits per month
Only pay for successful calls (data found)
Credits usable for reverse email lookup, CRM enrichment, AI search, etc.
Complete API access including our reverse email lookup, contact enrichment, live fetch etc. endpoints
Priority support (dedicated Slack channel)
2x rate limits
Includes:
150,000 credits per month
Only pay for successful calls (data found)
Credits usable for reverse email lookup, CRM enrichment, AI search, etc.
Complete API access including our reverse email lookup, contact enrichment, live fetch etc. endpoints
Priority support (dedicated Slack channel)
Custom higher rate limits
Request custom API endpoints