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GreyNoise alternatives: 4 apps ranked by verified data

Facts checked Nov 8, 2026AppBreakup editorialHow we rankAll threat intelligence platforms

Top picks

  • Shodan logo

    Best overall

    Shodan

    Starting price: $49 one-time (Membership)

  • Censys logo

    Best free option

    Censys

    Free plan + paid

  • MISP logo

    Best open source

    MISP

    Open source

Common reasons people leave GreyNoise: paid pricing is not published, and free tier has a low weekly search limit. We ranked 4 alternatives by how directly each one replaces GreyNoise, then by reviews, real visits and how recently each app's facts were checked against its own website. Shodan currently ranks first.

Quick comparison

#AppPricingVerified priceOpen sourcePlatformsVerified factsScore
1Shodan logoShodanFree plan + paid$49 one-time (Membership)NoWeb8 of 854.4
2Censys logoCensysFree plan + paid—NoWeb3 of 352.6
3Recorded Future logoRecorded FuturePaid—NoWeb, Browser extension4 of 442.3
4MISP logoMISPOpen source—YesSelf-hosted, Linux5 of 542.3
  1. Shodan logo

    1. ShodanTop pick

    Best for: Security researchers and IT teams checking what devices and services are exposed on the Internet

    Free plan + paidWeb

    54.4

    score / 100

    Why switch from GreyNoise

    Shows what services an IP exposes, useful context when investigating a suspicious address.

    Pros

    • Long-established index of device banners across the Internet
    • Official CLI and Python library for scripting searches
    • Network monitoring alerts for your own IP ranges

    Cons

    • Requires learning its filter syntax to get useful results
    • Filters, bulk downloads and scans consume paid credits
    • Website blocks many automated requests, making some info hard to reach
    Visit Shodan Details and reviews
    How this score is calculated
    Editorial fit ×0.352
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Shodan a good GreyNoise alternative?

    Verified facts

    8 of 8 verified
    What it indexes
    Internet-connected devices
    Checked Nov 8, 2026help.shodan.io(opens source in a new tab)
    Command-line tool
    Yes, installed with pip
    Checked Nov 8, 2026cli.shodan.io(opens source in a new tab)
    Query credits
    1 credit = 100 results
    Checked Nov 8, 2026help.shodan.io(opens source in a new tab)
    On-demand scanning
    1 scan credit per IP
    Checked Nov 8, 2026help.shodan.io(opens source in a new tab)
    Starting price
    $49 one-time (Membership)
    Checked Nov 8, 2026account.shodan.io(opens source in a new tab)
    Freelancer plan
    $69 a month
    Checked Nov 8, 2026account.shodan.io(opens source in a new tab)
    Small Business plan
    $359 a month
    Checked Nov 8, 2026account.shodan.io(opens source in a new tab)
    Corporate plan
    $1,099 a month
    Checked Nov 8, 2026account.shodan.io(opens source in a new tab)
  2. Censys logo

    2. Censys

    Best for: Security teams that need Internet-wide host and certificate data plus attack surface management

    Free plan + paidWeb

    52.6

    score / 100

    Why switch from GreyNoise

    Internet-wide scan data and attack surface tools for enriching IP and host investigations.

    Pros

    • Broad data covering hosts, ports, certificates, websites and DNS
    • Attack surface management and threat hunting built on the same data
    • API access included on all plans

    Cons

    • Free account covers only basic visibility into standard ports
    • Credit-based billing makes costs harder to predict
    • Larger plans go through sales demos
    Visit Censys Details and reviews
    How this score is calculated
    Editorial fit ×0.346
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Censys a good GreyNoise alternative?

    Verified facts

    3 of 3 verified
    Free plan
    Yes (basic visibility)
    Checked Nov 8, 2026censys.com(opens source in a new tab)
    API
    Included on all plans
    Checked Nov 8, 2026censys.com(opens source in a new tab)
    Data covered
    IPs, ports, certificates, websites, DNS
    Checked Nov 8, 2026censys.com(opens source in a new tab)
  3. Recorded Future logo

    3. Recorded Future

    Best for: Large security and fraud teams that need broad, scored threat intelligence wired into their tools

    PaidWeb, Browser extension

    42.3

    score / 100

    Why switch from GreyNoise

    Much broader intelligence covering actors, malware, dark web and fraud, not just scanning IPs.

    Pros

    • Very broad collection including dark web sources
    • In-house research team publishes analysis
    • Covers brand, third-party and payment fraud risk too

    Cons

    • Enterprise, quote-only pricing
    • Too large and costly for small security teams
    • Getting value needs analysts and integration work
    Visit Recorded Future Details and reviews
    How this score is calculated
    Editorial fit ×0.312
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Recorded Future a good GreyNoise alternative?

    Verified facts

    4 of 4 verified
    Data sources
    Over a million
    Checked Nov 8, 2026recordedfuture.com(opens source in a new tab)
    Integrations
    100+ native
    Checked Nov 8, 2026recordedfuture.com(opens source in a new tab)
    Solutions
    Four (cyber ops, digital risk, third-party, fraud)
    Checked Nov 8, 2026recordedfuture.com(opens source in a new tab)
    Research team
    Insikt Group
    Checked Nov 8, 2026recordedfuture.com(opens source in a new tab)
  4. MISP logo

    4. MISP

    Best for: CERTs and SOC teams that want a free, self-hosted way to store and share threat indicators

    Open sourceSelf-hostableSelf-hosted, Linux

    42.3

    score / 100

    Why switch from GreyNoise

    Free self-hosted platform to store, correlate and share your own indicators with peers.

    Pros

    • Free and open source under AGPL-3.0
    • Instance-to-instance sync suits trusted sharing communities
    • Automatic correlation across events and attributes
    • Exports to STIX, OpenIOC and IDS or SIEM formats

    Cons

    • Self-hosted only; you run and secure the server yourself
    • Interface and data model take time to learn for non-specialists
    • No vendor-curated commercial feeds bundled in like paid platforms
    Visit MISP Details and reviews
    How this score is calculated
    Editorial fit ×0.312
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is MISP a good GreyNoise alternative?

    Verified facts

    5 of 5 verified
    License
    AGPL-3.0
    Checked Nov 8, 2026github.com(opens source in a new tab)
    Price
    Free to use
    Checked Nov 8, 2026misp-project.org(opens source in a new tab)
    Export formats
    STIX, OpenIOC, IDS/SIEM
    Checked Nov 8, 2026misp-project.org(opens source in a new tab)
    Recommended OS
    Ubuntu 24.04
    Checked Nov 8, 2026misp-project.org(opens source in a new tab)
    Docker
    Yes, production-ready images
    Checked Nov 8, 2026misp-project.org(opens source in a new tab)

The best GreyNoise alternative for…

The highest-ranked app in this list for each need.

Shodan logo

Best GreyNoise alternative for most people

Shodan

Shows what services an IP exposes, useful context when investigating a suspicious address.

MISP logo

Best GreyNoise alternative for a free option

MISP

Free self-hosted platform to store, correlate and share your own indicators with peers.

Censys logo

Best GreyNoise alternative for a free plan you can upgrade

Censys

Internet-wide scan data and attack surface tools for enriching IP and host investigations.

MISP logo

Best GreyNoise alternative for open source

MISP

Free self-hosted platform to store, correlate and share your own indicators with peers.

MISP logo

Best GreyNoise alternative for self-hosting

MISP

Free self-hosted platform to store, correlate and share your own indicators with peers.

MISP logo

Best GreyNoise alternative for Linux

MISP

Free self-hosted platform to store, correlate and share your own indicators with peers.

Recorded Future logo

Best GreyNoise alternative for working in the browser

Recorded Future

Much broader intelligence covering actors, malware, dark web and fraud, not just scanning IPs.

GreyNoise alternatives: common questions

What is the best alternative to GreyNoise?

Shodan ranks first right now. Shows what services an IP exposes, useful context when investigating a suspicious address. Censys and Recorded Future follow it in our ranking.

GreyNoise vs Shodan: what's the difference?

Both GreyNoise and Shodan are free with paid plans. Both run on Web.

Is GreyNoise free?

GreyNoise is free with paid plans. Free plan: Community tier for IP lookups; Pricing structure: Platform tier plus modules. Checked on GreyNoise's own site, November 2026.

Is there a free alternative to GreyNoise?

Yes. Shodan (free plan + paid), Censys (free plan + paid) and MISP (open source) have a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to GreyNoise?

Yes: MISP. MISP can also be self-hosted.

Which GreyNoise alternatives work on Linux?

MISP runs on Linux.

Why do people switch from GreyNoise?

The complaints we hear most: paid pricing is not published; free tier has a low weekly search limit; only sees traffic that reaches its sensors, not full exposure data.

How is this list ranked?

Every app is scored with the same published formula: how directly it replaces GreyNoise, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.