Key Takeaways
- 275ms median INP across 5 test sites
- 460ms worst single INP on entrust.com
- 448ms CPU blocking time on the Accept button
- Dead last of all 9 CMPs tested
- <10KB SDK. Zero dependencies. No 275ms INP. No 448ms CPU blocking.
Why Teams Leave Osano
Osano has genuine strengths: the "No Fines, No Penalties" pledge, the open-source cookieconsent library, and 17,200+ customers. But three issues push teams toward an Osano alternative.
The INP Problem: Dead Last of 9 CMPs
DebugBear benchmarked the INP of 9 major CMPs. Google's "good" threshold is 200ms. Osano's results:
- 275ms median INP across 5 test sites
- 460ms worst single INP on entrust.com
- 448ms CPU blocking time on the Accept button
- Dead last of all 9 CMPs tested
| CMP | Median INP | Rank |
|---|---|---|
| Sourcepoint | 6ms | 1st |
| Usercentrics | 56ms | 2nd |
| Cookiebot | 57ms | 3rd |
| TrustArc | 67ms | 4th |
| Quantcast | 74ms | 5th |
| CookieYes | 81ms | 6th |
| Didomi | 95ms | 7th |
| OneTrust | 104ms | 8th |
| Osano | 275ms | 9th (last) |
The paradox: Osano's static performance is excellent (72% in Agence Web Performance, #1 for initial load). Small footprint. Brotli compression. But the moment a visitor clicks Accept or Reject, the main thread locks up for nearly half a second. Google uses INP as a Core Web Vitals metric, and pages exceeding 200ms are penalized in search rankings.
Learn more about CMP performance impact
The Free Tier Problem: A Banner Without Enforcement
Osano's free tier displays a consent banner but does not block cookies, scan your site, or store consent records. It's notification-only. Every cookie loads on page load regardless of what the visitor chooses.
This creates false confidence. The site owner sees a banner and believes they're GDPR-compliant. They're not. 59% of websites with CMPs still set cookies before consent. Osano's free tier guarantees you'll be one of them.
For comparison, ConsentStack's free tier includes full script blocking via MutationObserver, geo-detection, all consent models, and consent record storage for 1,000 visitors on 1 domain. See ConsentStack pricing.
The Pricing Problem
Osano's Business plan costs $99/month for 30K consent views and 2 domains:
| Feature | Osano ($99/mo) | ConsentStack Pro ($29/mo) | Cookiebot (~$34/mo) | CookieYes ($10-55/mo) |
|---|---|---|---|---|
| Domains | 2 | 2 included (+$5/extra) | 1 per plan | 1 per plan |
| Script blocking | Yes (paid only) | Yes (all tiers) | Scanner-based | Runtime |
| Analytics | CSV exports only | Built-in | Built-in | Built-in |
| Regulations | Multiple | 32 | Multiple | Multiple |
| INP impact | 275ms (worst) | Negligible | 57ms | 81ms |
At $99/month, Osano is 3.4x more expensive than ConsentStack Pro without offering better performance. The "No Fines" pledge is the differentiator.
"The price point is definitely steeper than competitors." -- Anonymous, Mid Market, Software Finder
What Osano Does Well
The "No Fines, No Penalties" pledge is genuinely unique. Up to $200,000 compensation if a paying subscriber gets fined. No other CMP offers this.
No dark patterns by default. Symmetric accept/reject buttons without pre-checked categories or fake processing delays. In an industry where TrustArc adds artificial delays and OneTrust pre-toggles categories, Osano's clean defaults deserve credit.
17,200+ customers. $25M Series B. Acquired WireWheel in 2023. Osano isn't going away.
Comparison Table
| Platform | Starting Price (30K MAU) | INP Impact | SDK Size | Free Tier Script Blocking | Regulations |
|---|---|---|---|---|---|
| ConsentStack | $29/mo | Negligible | <10KB | Yes (full compliance) | 32 |
| Cookiebot | ~$34/mo (per domain) | 57ms | 34KB (sync) | No (50 subpages) | Multiple |
| Ketch | $150/mo | N/A | 20.6KB | Limited (5K visitors) | 20+ |
| Termly | $14-20/mo (per site) | PageSpeed -30-37 pts | N/A | Partial (10K views) | Multiple |
| CookieYes | $10-55/mo (per domain) | 81ms | N/A | Partial (5K pageviews) | Multiple |
| OneTrust | $300/mo minimum | 104ms | 184KB+ | No | Comprehensive |
| TrustArc | ~$833/mo | 67ms | N/A | No | Comprehensive |
| Transcend | ~$833/mo minimum | Low | 54.3KB | No | Comprehensive |
| Osano (ref) | $99/mo | 275ms (worst) | Small | No (banner only) | Multiple |
The 8 Best Osano Alternatives
1. ConsentStack
Modern, performance-first consent management built for developers.
Where Osano locks up the main thread for 275ms on every click, ConsentStack delivers consent management in under 10KB gzipped with parse-time script blocking.
| Metric | ConsentStack | Osano (reference) |
|---|---|---|
| SDK size | <10KB gzipped | Small footprint |
| INP impact | Negligible | 275ms (worst of 9) |
| Pricing (30K MAU, 2 domains) | $29/mo | $99/mo |
| Free tier | Full compliance engine | Notification only |
| Script blocking | Parse-time MutationObserver | Runtime (paid only) |
| Regulations | 32 (every tier) | Multiple |
| Platform adapters | 6 included | Limited |
Pros:
- <10KB SDK. Zero dependencies. No 275ms INP. No 448ms CPU blocking.
- Parse-time script blocking. MutationObserver blocks scripts before execution. This is how 59% of CMPs fail.
- Free tier with real compliance. Script blocking, geo-detection, all consent models, consent record storage.
- $29/mo Pro for 30K visitors, 2 domains, 6 platform adapters, 32 regulations, built-in analytics.
- Self-serve from sign-up to live. No sales calls. Configure in the visual builder, copy a script tag, done.
- 6,592 tracker domains auto-classified via DuckDuckGo Tracker Radar.
- No dark patterns by design. Symmetric buttons, no pre-checked categories, no processing delays.
Cons:
- Pre-launch. No years of enterprise deployments or $200K compliance guarantee.
- No TCF 2.0 yet. The Belgian DPA found IAB TCF itself violates GDPR.
- No DSAR workflows. Consent management only.
- No dedicated support tier. Self-serve by design.
Best for: Developers and growing companies who want full compliance without the INP penalty, decorative free tiers, or $99/month pricing.
2. Cookiebot (by Usercentrics)
Scan-based CMP with strong INP and per-domain billing.
Cookiebot is widely used for small and mid-size European websites. Google-certified for Consent Mode v2. At 57ms median INP, it's nearly 5x faster than Osano on click interactions.
Pros:
- 57ms INP, nearly 5x faster than Osano's 275ms.
- Google-certified CMP. Quick WordPress plugin setup. Automatic cookie scanning.
Cons:
- Price doubled in August 2025. Common jump: $15/month to $30/month.
- Per-domain billing. Three domains: ~$102/month. Subdomains count separately.
- 209 DOM nodes injected (highest benchmarked). 11-minute cache TTL (shortest).
- Daily scanning: extra ~$115/month (€99/month).
"€30/month for a cookie banner is completely disproportionate for a small business. Cookiebot is no longer suitable for small creators." -- Toni Schuster, Trustpilot, Jan 2026
Best for: WordPress sites needing Google CMP certification. Be prepared for price increases.
3. Ketch
Enterprise data permissioning platform with a steep learning curve.
Ketch includes consent management, DSR automation, data mapping, and AI governance. If Osano is overpriced for what you need, Ketch at $150/month is likely more so, unless you need enterprise privacy workflows.
Pros:
- DSR automation is a real enterprise differentiator. Strong support with dedicated CSMs.
- Comprehensive regulatory coverage (20+ frameworks). Free tier available (5K visitors).
Cons:
- 13 configuration steps before deploying. 56+ proprietary terms.
- $150/month for 30K visitors. 2-4 week onboarding.
- Zero organic community presence (0 Reddit threads, 0 Trustpilot reviews).
"The platform's comprehensive features may be overwhelming for smaller organizations." -- G2
Best for: Enterprises needing DSR automation, data mapping, and AI governance alongside consent.
4. Termly
Budget consent tool that tanks WordPress performance.
Termly costs $14-20/month per site. Google Gold CMP Partner. Policy generators included. The tradeoff: performance destruction.
Pros:
- 5-10x cheaper than Osano. Policy generators included. Free tier (10K banner views).
Cons:
- 30-37 PageSpeed point drops on WordPress. Sites go from 70-74 to 37-43.
- Auto Blocker does NOT work with GTM. Scripts fire without consent.
- Key features gated behind $20/mo Pro+ plan.
Best for: Budget-conscious small sites not using GTM, where PageSpeed isn't a priority.
5. CookieYes
Budget CMP with catastrophic DOM bloat.
CookieYes starts at $10/month per domain. Generous free tier. At 81ms INP, it's 3.4x faster than Osano.
Pros:
- Cheapest paid option. 81ms INP. Free tier (5,000 pageviews). Works on any website.
Cons:
- 48,000 DOM elements with IAB TCF (Google recommends under 1,500).
- 6.5-second LCP on mobile. The banner itself becomes the slowest element.
- Per-domain pricing. No branding removal below $55/month.
"The banner adds about 48,000 elements to the DOM. On mobile, the banner is the LCP, with an immense 6.5 seconds." -- stefanchetan, WordPress.org
Best for: Simple, low-traffic sites needing the cheapest possible consent tool.
6. OneTrust
The enterprise option when budget is unlimited.
OneTrust is the market leader by revenue. For Fortune 500 companies, it's the standard. For everyone else, it's a $300/month cookie banner.
Pros:
- Most comprehensive privacy platform (data mapping, DSAR, AI governance).
Cons:
- $300/month minimum. Median annual spend: $11,500.
- 184KB+ SDK. LCP jumps from 1.43s to 3.61s. 1.5-1.7/5 Trustpilot.
- Requires sales calls, contracts, multi-week implementation.
"Must be the absolutely worst developer experience I've ever had with any tool." -- Trustpilot
Best for: Fortune 500 companies with dedicated privacy teams. Not a practical Osano replacement.
7. TrustArc
The CMP listed on deceptive.design.
TrustArc has 67ms INP (4x faster than Osano technically), but fake 20-60 second opt-out processing delays, a 1.9/5 Trustpilot rating, and ~$10,000/year minimums.
Cons:
- Fake 20-60 second opt-out delays. Network inspection confirms no server communication. The delay is artificial.
- Listed on deceptive.design. FTC-fined $200,000. 1.9/5 Trustpilot with 92% one-star reviews.
- ~$10,000/year minimum. 8x Osano's annual cost.
Best for: Difficult to recommend.
8. Transcend
Enterprise network-level privacy layer.
Transcend's airgap.js inspects all outgoing transmissions at the network level. Named IDC MarketScape Leader in 2025.
Pros:
- Network-level script blocking. Clean ethical positioning. Strong G2 reviews (4.6/5).
Cons:
- ~$130,000/year average contract. 54.3KB SDK + 342KB lazy-loaded UI.
- Aggressive renewal pricing. Multi-session onboarding.
"The cookie and data flow triage process is much more involved, time consuming and difficult than some were led to believe." -- SoftwareReviews
Best for: Fortune 500 companies with six-figure compliance budgets.
Parse-Time vs Runtime Script Blocking
59% of websites with CMPs still set cookies before consent. Most CMPs use runtime script blocking, trying to prevent scripts that have already started executing. Parse-time blocking installs a MutationObserver during HTML parsing, blocking scripts before the browser fetches or executes them.
Osano uses runtime blocking. On paid tiers, it works. On the free tier, it doesn't block at all. Even on paid tiers, there's a window where tracking scripts can fire without consent.
| Approach | CMPs |
|---|---|
| Parse-time blocking | ConsentStack (MutationObserver), Transcend (airgap.js) |
| Runtime / tag manager | Osano, OneTrust, Cookiebot, Ketch, Termly, CookieYes, TrustArc |
Learn how script blocking works
Frequently Asked Questions
**It depends on your risk profile.** The pledge compensates up to $200,000 if a paying subscriber gets fined, which is valuable for highly regulated industries. However, most small and mid-size companies face lower enforcement probability than the $70/month premium implies. If your alternative CMP uses parse-time script blocking, better engineering already prevents the violations the pledge insures against.
The SDK loads small but processes clicks slowly. When a visitor clicks Accept or Reject, the click handler triggers **448ms of CPU blocking time**. The browser can't respond until Osano finishes processing. The cause is likely heavy synchronous processing (consent signal dispatching, cookie writes, script unblocking) happening inline instead of being deferred asynchronously.
**ConsentStack** offers script blocking on its free tier (1,000 visitors, 1 domain) using parse-time blocking. Pro at **$29/month** covers 30K visitors with 2 domains. **Termly** ($14-20/month) has Auto Blocker, but it doesn't work with GTM and causes 30-37 PageSpeed drops. **CookieYes** ($10/month) has runtime blocking but 48,000 DOM elements. ConsentStack is the only budget option that blocks scripts without introducing a new performance problem.
**No.** Osano's free tier does not block cookies, scan your site, or store consent records. Under GDPR, you must collect consent **before** setting non-essential cookies and demonstrate that consent was collected. The free tier does neither. It creates the appearance of compliance without the substance.
**No.** Set up the new CMP on staging, test consent flows, then swap script tags. Existing Osano consent records stay in Osano. Returning visitors see the new banner and provide fresh consent. The switchover is a single-line code change with zero downtime. ---
Conclusion
Osano has a genuinely unique value proposition with the "No Fines" pledge. For companies that need the compliance guarantee and can absorb $99/month, it remains a legitimate choice.
But the data tells a clear story. 275ms median INP, dead last of 9 CMPs. A free tier that shows a banner without blocking a single cookie. $99/month for features competitors deliver at $29-59/month.
ConsentStack fills the gap: <10KB SDK, 32 regulations, parse-time script blocking, 6 platform adapters, and $29/month Pro pricing. No sales call required. No 275ms INP. No decorative free tier. Try ConsentStack free.
Try it free. No credit card. No sales call. No consent banner that freezes for a quarter of a second every time someone clicks it.