Independent Rankings You Can Trust
PeptideScores provides unbiased, data-driven research peptide vendor rankings to help researchers worldwide make informed decisions. No pay-for-play. No hidden agendas. Just transparent rankings — verified by algorithm and manual human review — updated daily.
Our Core Values
The principles that guide everything we do
Independence
Rankings are produced by our scoring algorithm combined with mandatory human review. No vendor can pay for higher placement in our algorithmic results.
Data-Driven
Every score is calculated from verifiable, multi-source data — not opinions or sponsored content.
Always Current
Rankings are recalculated daily to reflect real-world changes in quality, reputation, and availability.
Researcher-Focused
We exist solely to help researchers make faster, more confident supplier decisions.
How We Score Peptide Vendors
Every vendor score on PeptideScores is the result of three layers working together: real human judgment, a transparent weighted algorithm, and AI-assisted data processing. No single layer operates in isolation — and no vendor can game the system.
Human Review
Every vendor listed on PeptideScores has been manually reviewed by a real person. Our team actively monitors researcher communities, verifies lab documentation, places test orders, and makes subjective calls that no algorithm can replicate. A vendor with an impressive score sheet but a pattern of community complaints will not rank well here — because a human has read those complaints.
Human review also serves as a quality gate. Vendors that fail basic standards for transparency, documentation, or community standing are excluded entirely before any score is calculated.
Weighted Algorithm
Approved vendors are scored across six primary weighted dimensions: purity, reputation, service, shipping, pricing, and selection. Purity and third-party lab testing carry the greatest weight because they directly reflect product integrity.
Where available, vendors also receive granular subscores within each category — for example, breaking purity down by HPLC results, endotoxin testing, and COA disclosure. These subscores add precision and are displayed on individual vendor profiles. Weights are calibrated to reflect what researchers care about most, and no vendor can pay to influence where the algorithm places them.
AI-Assisted Analysis
Research peptide communities generate enormous volumes of discussion across forums, review platforms, and social media. AI helps us process this at a scale that would be impossible manually — flagging sentiment shifts, surfacing emerging complaints, and identifying inconsistencies in vendor claims.
Critically, AI findings are always reviewed by a human before they influence a score. AI is a research tool for us, not a decision-maker. The final call on every vendor's standing rests with our editorial team.
Score Breakdown by Factor
Each category also contains granular subscores — visible on individual vendor profiles — that break down exactly how each dimension was evaluated.
Third-party certificates of analysis (COAs), HPLC results, and endotoxin testing. This is the single most important factor — purity is non-negotiable for legitimate research.
Verified community sentiment across research forums, Trustpilot, and independent review platforms. We look beyond star ratings to assess consistency and authenticity.
Response time, issue resolution, and pre-sale communication quality. Good service is a reliable indicator of an operation that takes its customers seriously.
Dispatch speed, packaging integrity, international shipping capability, and discreet delivery options. Shipping reliability directly impacts research timelines.
Value for money relative to purity and quality. We assess price per milligram, bulk discount structures, and whether pricing reflects actual product quality.
Breadth of peptide catalogue, availability of specialty compounds, and consistency of stock. A wide, well-maintained inventory signals a serious, established operation.
Transparency First
We believe in complete transparency about how we operate
Affiliate Relationships
PeptideScores earns commissions when you click certain links and make purchases. This helps fund our operations and keeps the site free for users. However, our ranking algorithm is completely independent of these relationships. Vendors cannot pay for higher rankings or featured placements in our algorithmic results.
Data Sources
Our scores are derived from publicly available data including vendor websites, third-party lab testing results, community forums, and aggregated user feedback. We continuously work to expand and verify our data sources.
Sponsored Content
When content is sponsored or when we feature a vendor outside of our algorithmic rankings, we clearly label it as such. You will always know when a placement is paid versus earned through our scoring system.
Frequently Asked Questions
Can vendors pay to improve their ranking?
No. Our algorithmic rankings cannot be influenced by payment. Vendors can participate in sponsored placements (clearly labeled), but these are entirely separate from our independent ranking system.
How often are rankings updated?
Rankings are recalculated daily based on the latest available data. Major data sources are refreshed regularly to ensure accuracy, and significant events — like a vendor obtaining new lab results or receiving a wave of community complaints — are factored in as soon as they are verified.
How can a vendor improve their ranking?
By genuinely improving. The most impactful steps are obtaining third-party lab testing with publicly available COAs, building a consistent track record of good customer service, and maintaining a positive reputation in the research community. There are no shortcuts — the algorithm rewards authentic quality and penalizes vendors who fall short.
Is PeptideScores affiliated with any vendor?
We are not owned by or formally affiliated with any vendor. We maintain affiliate relationships for revenue, but these do not influence our independent rankings. A vendor we earn commission from is held to exactly the same standard as one we do not.
How can I report inaccurate information?
Please use our contact form to report any inaccuracies. We take data quality seriously and will investigate all reports promptly. Vendors may also reach out directly if they believe a data point is incorrect and can provide documentation.