Looking for a ChemSpider alternative?
Find millions of compounds, reactions, properties, and documents
Starting at just $40/month
Quick summary
- Saguaro Chem is a reaction database with synthetic procedures; ChemSpider is a compound database with property data
- If you need compound properties or spectra, ChemSpider is still the right tool
- Saguaro Chem answers the "how do I synthesize this compound" question with experimental data from the literature
What is Saguaro Chem?
Saguaro Chem is a web-based chemical reaction database built for independent researchers, students, and small labs. Search synthetic procedures, reaction conditions, yields, and source documents by chemical structure, substructure, similarity, or bibliographic metadata — without an institutional subscription.
About ChemSpider
ChemSpider is a free chemistry database maintained by the Royal Society of Chemistry. It contains compound and substance records with chemical structures, properties, spectra, and links to related literature, all community-curated through user contributions and automated sources. For compound identification and property lookup, it does the job well. But like PubChem, it has a gap: it does not do reaction search, synthetic procedures, or extracted experimental conditions from the literature.
You can find a compound, but you cannot find how to make it. No stepwise procedures, no reaction conditions, no yields, no source passages. Saguaro Chem fills that gap.
Is Saguaro Chem a good fit for you?
- Researchers who need reaction search, not just compound lookup
- Chemists who want synthetic procedures and reaction conditions from the literature
- Researchers who want experimental context including yields and source passages
- Anyone who has found a compound in ChemSpider and needs a synthesis route
Compound data vs reaction data
ChemSpider and Saguaro Chem serve different needs. ChemSpider tells you what a compound is: its structure, properties, spectra, and identifiers. Saguaro Chem tells you how to make it: the reactions, procedures, conditions, and yields reported in the literature. If your workflow involves finding a compound and then figuring out how to synthesize it, the two tools work well together.
Data sources and curation
ChemSpider is community-curated, which means data quality can vary depending on the source. It aggregates from multiple databases and user contributions, which is great for coverage but can lead to inconsistencies. Saguaro Chem extracts reaction data directly from peer-reviewed journals and patents. Each result includes the source passage, so you can verify the data against the original publication. The approaches are different: ChemSpider crowdsources compound data, Saguaro Chem extracts reaction data from primary sources.
When ChemSpider is still the right choice
ChemSpider is free and has strong compound coverage, particularly for spectra and property data through its RSC integrations. If your primary need is compound identification, property lookup, or spectral data, ChemSpider is the right tool and there is no reason to stop using it. Saguaro Chem does not try to replace ChemSpider for compound data. It complements ChemSpider by covering the reaction and synthesis side.
What Saguaro Chem brings to the table
- Search reactions by structure, substructure, or similarity using SMILES, InChI, or the built-in Ketcher drawing tool
- Reaction and bibliographic metadata search by DOI, title, author, or journal
- Results from peer-reviewed journals and patents with full experimental context
- Stepwise synthetic procedures, reaction conditions, yields, and source passages
- No institutional license required. Sign up individually in under two minutes
- Transparent pricing starting at $40/month with a 7-day free trial
A custom chemistry database from 30+ journals and patents
6M+
Compounds
13M+
Reaction passages indexed
15M+
Characterization details
Extracted directly from 30+ top peer-reviewed journals and patent offices including:
- Nat. Chem.
- Organic Letters
- J. Org. Chem.
- Angew. Chem.
- Adv. Synth. Catal.
- Green Chem.
- Chem. Sci.
- USPTO Patents
Coverage is selective but spans a significant portion of each source's reaction literature.
Ready to try Saguaro Chem?
Individual
Individual access to Saguaro Chem
- Structure, substructure & similarity search
- Reaction procedures, conditions, yields & characterization data
- Source documents with DOI & patent links
- No VPN required — use from anywhere
Team
Team access to Saguaro Chem
- Everything in the Individual plan
- 3 seats included, up to 10 total
- Additional seats at $30/month each
- Centralized billing & team management
Enterprise
Custom deployment and integration for organizations
Pricing
Custom pricing for your organization
Tailored to your needs
- Everything in the Team plan, scaled to your org
- SSO / SAML & custom authentication
- Isolated or dedicated hosting options
- API access & custom data pipelines
- Dedicated support & onboarding — let's talk
No price increases without 90 days notice · Cancel any time, one click, no retention loops · Subscriptions auto-renew until cancelled.
All prices in USD. Digitally delivered subscription — access begins immediately after account activation. 7-day free trial requires a credit card; cancel before it ends and you won't be charged. All fees are non-refundable except as required by applicable law. View full subscription & billing terms
Have questions? Learn more about Saguaro Chem or contact us
Frequently asked questions
No. ChemSpider is a free service from the Royal Society of Chemistry. Saguaro Chem offers a 7-day free trial, after which individual plans start at $40 per month. The subscription covers the cost of extracting and maintaining reaction data from the literature.
No. ChemSpider and Saguaro Chem serve different purposes. ChemSpider is a compound database with property and spectral data. Saguaro Chem is a reaction database with synthetic procedures. Many researchers use both together.
ChemSpider links to related literature but does not extract or display synthetic procedures, reaction conditions, or yields. Saguaro Chem provides stepwise procedures, conditions, yields, and source passages directly in search results.
No. Saguaro Chem focuses on reaction search and synthetic procedures. It does not include spectral data or compound property data. ChemSpider is a better tool for that type of lookup.
Saguaro Chem indexes data from over 13 million reaction passages — individual text segments extracted from source literature that describe a reaction. Not all data types are available for every record. Some entries include the raw source passage, others include annotated procedures, reaction schemes, or characterization data, and some may only contain the extracted compounds and their roles in the reaction. The specific data available depends on the source document and extraction quality.
Saguaro Chem indexes experimental reaction information from 30+ peer-reviewed journals, including: ACS Catalysis, ACS Chemical Neuroscience, ACS Medicinal Chemistry Letters, ACS Omega, ACS Pharmacology & Translational Science, Advanced Synthesis & Catalysis, Angewandte Chemie International Edition, Asian Journal of Organic Chemistry, Beilstein Journal of Organic Chemistry, ChemCatChem, ChemMedChem, Chemical Communications, Chemical Science, Chemistry – A European Journal, Chemistry – An Asian Journal, Chinese Journal of Chemistry, European Journal of Organic Chemistry, Green Chemistry, Journal of Medicinal Chemistry, Molbank, Molecules, Nature Chemistry, Nature Synthesis, New Journal of Chemistry, Organic & Biomolecular Chemistry, Organic Chemistry Frontiers, Organic Letters, Synlett, Synthesis, Tetrahedron, Tetrahedron Letters, The Journal of Organic Chemistry.
Yes. Saguaro Chem currently indexes reaction information from USPTO granted patents. We are actively working to expand patent coverage to additional patent offices in future updates.
Yes. Saguaro Chem extracts and indexes stepwise experimental procedures directly from source literature. Each procedure includes reagents, quantities, reaction conditions, and workup steps where reported, presented in a clean, structured format so you can reproduce the synthesis in the lab.
No. For reactions sourced from academic articles, Saguaro Chem does not display the source text or distribute PDFs. Instead, we try to show as much non-passage context as possible in the form of a reaction scheme and an annotated procedure, along with characterization details where available — though the specific data types available may vary by entry and are not necessarily comprehensive. Each entry links back to its original source so you can access the complete publication or supplementary information on the publisher's website.
Yes. Unlike academic articles, Saguaro Chem does display the raw source passages from patents for reactions sourced from patent literature. Each patent-sourced entry includes the relevant excerpt from the original patent text alongside the structured data, so you can read the procedure, conditions, and characterization details exactly as they appear in the patent.
Yes. We never log the contents of your search queries — no SMILES strings, no structure drawings, no text searches are ever recorded. Our infrastructure is hosted on SOC 2 Type II compliant hosting (Railway), accounts support two-factor authentication via Clerk, and IP addresses are truncated and hashed before any storage.
All payments are handled by our authentication provider, Clerk, which uses Stripe as its underlying payment processor. De Novo Chem never sees, stores, or handles your credit card information — the entire payment flow is managed by Clerk and Stripe.