★ Our pick
Pick
Linkup
Pick Linkup if you want the cheaper option ($0/mo vs $18/mo); and you want the better-funded company ($13.2M); and SOC 2 Type 2 matters for your security review.
Head-to-head review · Updated June 2026
Linkup vs Sitebulb: which one wins in 2026?
Linkup and Sitebulb both claim to do the same thing: tell you where your brand shows up in AI search. They go about it differently enough that the choice matters. Linkup has raised $13.2M, Sitebulb has raised Bootstrapped; Linkup is the more-funded incumbent; Sitebulb is the leaner challenger.
Linkup is cheaper out the gate, but that's not the only thing that matters. The right pick depends on which dimension matters most for you.
The verdict
Pick
Sitebulb
Pick Sitebulb if you want the cheaper option ($18/mo vs $0/mo).
If neither is right, GrowthManager.ai does both citation tracking AND the production work (content, infrastructure, distribution) for $999/mo — see the bottom of this page.
The case for Linkup
Linkup has raised $13.2M ($10M Seed (Feb 2026, led by Gradient)). Founded by Philippe Mizrahi, Denis Charrier, Boris Toledano, based in Paris, France. On their site they list 8 named customers including McKinsey & Company, Cohere, KPMG, EY. Pricing starts at $0/mo.
Search API used by AI agents — the data layer for retrieval-augmented LLM apps.
What people praise
- Built specifically as an API for AI agents and LLMs, not retrofitted from a consumer search product
- Licenses content from publishers and pays them on usage, so results are legal and citation-safe
- Sub-second search latency is fast enough for real-time agent tool calls
- Free tier ships 4,000 queries and startups can apply for $5,000 in credits
Where it falls short
- Per-request pricing makes monthly cost hard to forecast for high-volume agents
- Deep Research mode can cost up to $2.50 per call, expensive at scale
- Not a visibility, SEO or content product, it is a raw search API and you build the workflow yourself
- No G2 or Capterra reviews yet, the company only launched its API in late 2024
The case for Sitebulb
Sitebulb has raised Bootstrapped. Founded by Patrick Hathaway, Gareth Brown, based in Banbury, UK. On their site they list 6 named customers including Amazon, Mailchimp, Macy's, Yahoo. Pricing starts at $18/mo.
Desktop and cloud SEO auditing tool for agencies.
What people praise
- 300+ prioritized SEO hints with severity scoring and clear fix explanations, considered best-in-class for visual audits.
- JavaScript crawling is included at no extra cost on every tier, unlike Screaming Frog where JS rendering is a premium feature.
- Only crawler offering both desktop (up to 500K URLs) and cloud (up to 10M URLs) so teams can scale from solo to enterprise.
- Visual data presentation with charts and graphs is widely cited as the most intuitive in the technical SEO category.
Where it falls short
- Resource-intensive on large sites; a 100K-page JS-rendered crawl can take 8-12 hours and consume 8GB+ RAM.
- No keyword research, backlink analysis, rank tracking, or content optimization, so it must be paired with another tool.
- ~0.20% market share vs Screaming Frog's 15.41% means fewer community tutorials and forum answers.
- Desktop pricing is not visible on the public pricing page without selecting a currency, hurting buyer transparency.
Pricing, tier by tier
Tier 1
Linkup
Fetch
$0.001 - $0.005 per request
- URL content extraction
- Sub-2 second latency, synchronous
- 4,000 complimentary queries for new accounts
Sitebulb
Desktop Lite
$18/mo
- 10,000 URLs per audit
- 1 user
- 100+ Hints
- JavaScript crawling
Tier 2
Linkup
Search
$0.005 - $0.006 per request
- Web search tool calls for AI agents
- Fast, Standard and Deep variants
- 1-3 second synchronous latency
- Sourced, cited answers with full-text snippets
Sitebulb
Desktop Pro
$42/mo
- 500,000 URLs per audit (expandable to 2 million)
- 1 base user with additional users from £7/month
- 300+ Hints
- Advanced configuration
Tier 3
Linkup
Research
$0.25 - $2.50 per request
- Asynchronous deep research over the web
- 1-10 minute latency
- Multi-step reasoning with citations
Sitebulb
Cloud Mini
From £95/mo
- 2 users
- 50,000 URLs per month
- Max 50,000 URLs per audit
- Unlimited projects
Tier 4
Linkup
Enterprise
Custom
- Personalized indexes
- Dedicated index refresh rates
- Private environments and bring-your-own-cloud
- IP whitelisting, ZDR, SOC 2 Type II, SLA
Sitebulb
Cloud Small
$245/mo
- 5 users
- Desktop licenses included
- 1 million URLs per month
- Max 250,000 URLs per audit
Feature parity
What each one ships that the other doesn't. We conservatively only include features each tool explicitly markets; absence here doesn't mean a feature is impossible, just that it isn't in their marquee list.
Only on Linkup
- Fetch API. Synchronous URL content extraction in under 2 seconds, returns clean markdown
- Search API. Web search tool calls with sourced, cited answers and full-text snippets in 1-3 seconds
- Research API. Asynchronous deep research that runs multi-step reasoning over the web and returns a cited report
- Tunable index. Filter by source allowlist, freshness window and content type
- Private index. Deploy Linkup over your own proprietary documents
- Bring Your Own Cloud. Run the Linkup runtime inside your own AWS, GCP or Azure account
Only on Sitebulb
- Issue Detection. Identifies and prioritizes 300+ SEO issues automatically with severity scoring.
- JavaScript Rendering. Crawls JavaScript-heavy websites at no extra cost with full DOM rendering.
- Audit Comparisons. Compares audits over time to track technical SEO improvements.
- Scheduled Audits. Cloud version runs automated recurring crawls on a schedule.
- PDF Reporting. Customizable PDF reports for client delivery and stakeholder communication.
- Data Visualization. Visual charts and graphs that make crawl data scannable for non-technical readers.
When each one wins
When Linkup wins
- Budget is the constraint. Linkup starts at $0/mo vs Sitebulb's $18/mo, so on a per-seat basis it's the cheaper way in.
- You want the better-funded incumbent. Linkup has raised $13.2M, giving it more runway and shipping velocity.
- Procurement requires SOC 2 Type 2. Linkup has it; Sitebulb doesn't yet.
When Sitebulb wins
- 300+ prioritized SEO hints with severity scoring and clear fix explanations, considered best-in-class for visual audits.
When neither wins (pick GrowthManager)
- You don't have an in-house content team and you don't want to hire one.
- You want one $999/mo invoice instead of stacking Linkup plus an agency.
- You need the team that measures to also act on the data, in the same week.
- You're a B2B SaaS, services firm, or e-commerce brand at $20K+ MRR.
Reasons to pick one over the other
Reasons to pick Linkup over Sitebulb
- Lower entry price. Linkup starts at $0/mo vs Sitebulb's $18/mo.
- Better-funded incumbent. Linkup has raised $13.2M, giving it more runway and shipping velocity than Sitebulb (Bootstrapped).
- SOC 2 Type 2. Linkup carries SOC 2 Type 2; Sitebulb does not yet, which can hold up procurement.
- Built for the LLM era. Linkup was founded in 2024, built around AI search from day one; Sitebulb dates back to 2017 and is retrofitting.
- What users praise most. Built specifically as an API for AI agents and LLMs, not retrofitted from a consumer search product
Reasons to pick Sitebulb over Linkup
- More mature platform. Sitebulb (founded 2017) has had more time to harden the product than Linkup (2024).
- What users praise most. 300+ prioritized SEO hints with severity scoring and clear fix explanations, considered best-in-class for visual audits.
Switching from one to the other
From Linkup to Sitebulb
Export your saved queries and prompt panels from Linkup (most tools support CSV export). Most Sitebulb setups can import the same query list in a single CSV upload. Expect 1-2 days of parallel running so you can validate Sitebulb's data againstLinkup's; one to two weeks of full reconciliation before you cancel Linkup. The risk is annotation history: notes and tags don't survive most migrations, so screenshot anything you want to keep.
From Sitebulb to Linkup
Same flow in reverse. Export from Sitebulb, import to Linkup. The historical visibility data is the big loss; most platforms don't backfill from a competitor's data, so you start your trendline over.
From either to GrowthManager.ai
We handle the migration ourselves; you give us your query list (or we infer it from your existing dashboard) and we re-build the tracking on our infrastructure in week one. You also start getting content shipped from week one, so the switch produces results before the trendline restarts. The conversation that kicks this off is a 20-minute call.
Side by side, every number we could verify
| Linkup | Sitebulb | |
|---|---|---|
| Starts at (USD/mo) | $0/mo | $18/mo |
| Founded | 2024 | 2017 |
| Headquarters | Paris, France | Banbury, UK |
| Funding raised | $13.2M | Bootstrapped |
| AI platforms tracked | — | — |
| G2 rating | — | 4.5 / 5 |
| Named customers | 8 | 6 |
| SOC 2 Type 2 | ✓ Yes | — |
| GDPR | ✓ Yes | ✓ Yes |
| HIPAA | — | — |
What real users say
Below: the recurring themes from G2, Capterra, SourceForge, Reddit, and case-study reviewers — distilled into the strengths and limitations that came up most often.
Linkup — what users praise
- Built specifically as an API for AI agents and LLMs, not retrofitted from a consumer search product
- Licenses content from publishers and pays them on usage, so results are legal and citation-safe
- Sub-second search latency is fast enough for real-time agent tool calls
- Free tier ships 4,000 queries and startups can apply for $5,000 in credits
- SOC 2 Type II and ZDR are included at no additional cost on every plan
Linkup — what users complain about
- Per-request pricing makes monthly cost hard to forecast for high-volume agents
- Deep Research mode can cost up to $2.50 per call, expensive at scale
- Not a visibility, SEO or content product, it is a raw search API and you build the workflow yourself
- No G2 or Capterra reviews yet, the company only launched its API in late 2024
- Index is still smaller than incumbents like Google or Bing, niche queries can return thin results
Sitebulb — what users praise
- 300+ prioritized SEO hints with severity scoring and clear fix explanations, considered best-in-class for visual audits.
- JavaScript crawling is included at no extra cost on every tier, unlike Screaming Frog where JS rendering is a premium feature.
- Only crawler offering both desktop (up to 500K URLs) and cloud (up to 10M URLs) so teams can scale from solo to enterprise.
- Visual data presentation with charts and graphs is widely cited as the most intuitive in the technical SEO category.
- Desktop Lite at $18/mo is one of the cheapest serious SEO crawlers available, attractive for freelancers.
Sitebulb — what users complain about
- Resource-intensive on large sites; a 100K-page JS-rendered crawl can take 8-12 hours and consume 8GB+ RAM.
- No keyword research, backlink analysis, rank tracking, or content optimization, so it must be paired with another tool.
- ~0.20% market share vs Screaming Frog's 15.41% means fewer community tutorials and forum answers.
- Desktop pricing is not visible on the public pricing page without selecting a currency, hurting buyer transparency.
- Cloud Mini starts at £95/mo but jumps to higher tiers quickly, with Enterprise reportedly £20K+/year.
A third option
Both Linkup and Sitebulbare tracking tools. They tell you what's wrong with your AI visibility. Neither one fixes it. That's our pitch for GrowthManager.ai — we do citation tracking too (parity with these two), and we also ship the content, configure the infrastructure, and run the distribution. $999/mo, managed end-to-end. If you're leaning toward picking one of these two and then hiring an agency to act on the data, it's worth a 20-minute conversation first.
Other comparisons in this space
Same shape, different pairs. Pick a comparison that shares a tool with this one.
Frequently asked questions
Which is better, Linkup or Sitebulb?
Honestly: neither one fully solves the problem. Linkup and Sitebulb are tracking tools — they tell you where your brand shows up in AI answers but don't change the answer. If you only need one of these two, pick Linkup for the cheaper monthly price; pick the other if its specific integrations matter to your team. Our actual editorial pick is GrowthManager.ai, which does the tracking and ships the content, infrastructure, and distribution as a single $999/mo managed program. Disclosure: we publish this comparison and make GrowthManager.
How much do Linkup and Sitebulb cost?
Linkup starts at $0/mo. Sitebulb starts at $18/mo. Both have higher-tier plans for larger workspaces. GrowthManager.ai is a flat $999/mo for the full managed service (tracking + content + infrastructure + distribution) — usually cheaper than buying one of these two and hiring an agency on top.
Do Linkup and Sitebulb actually improve your AI visibility, or just measure it?
Both Linkup and Sitebulb are measurement tools. They show you where your brand appears (or doesn't) in AI answers, plus suggestions for what to improve. Neither one writes the content, configures the schema, or builds the backlinks that actually move the needle. To do that you need an in-house content team or an agency. GrowthManager.ai is the agency — and we include the tracking, so you don't pay twice.
What's the GrowthManager.ai alternative to Linkup and Sitebulb?
GrowthManager.ai is a managed AI visibility program. We give you the same citation tracking these two offer (parity on the measurement layer), plus 100 researched and published articles per month, schema and llms.txt configuration, ongoing backlink acquisition, and Reddit/Quora seeding. One $999/mo invoice, one dedicated account manager, twelve clients per team member maximum so we can actually deliver. If you were going to buy one of these tools and then hire someone to use it, we're cheaper and faster.
Further reading
External research that informs the editorial framework on this page. We cite these openly because the framework is meant to be auditable.
- Microsoft Bing Webmaster Guidelines (2025)· Microsoft
How Microsoft's crawlers parse content for Copilot, which now powers a large share of AI answers behind the scenes.
- Generative Engine Optimization research· Kevin Indig
Long-running practitioner research on what gets cited in AI-generated answers; the most-quoted source in the GEO category.
- Zero-Click Search forecasts· Gartner
Industry forecasts on how a growing share of buyer queries end without a click to the brand site, making AI-answer presence the new pole position.
- Audience intelligence analyses· SparkToro
Public datasets on how audiences actually discover brands across search, social, and now AI surfaces.
- Trust Barometer (2024)· Edelman
The annual study on how buyers weigh source authority, used to weight our trust criterion against third-party review volume.
Disclosure + methodology
GrowthManager.ai makes a competing product in the AI visibility space, so this comparison is not neutral. Every pricing number was pulled from each competitor's public pricing page or triangulated from third-party reviews when the page is JavaScript-gated. Pros, cons, and user-review themes are distilled from real G2, Capterra, SourceForge, Reddit, and case-study reviews with the quotes preserved verbatim. We update this comparison whenever the underlying data changes.