I am not a financial advisor, all the information presented below is my own subjective opinion, please do your own research - DYOR.

What is OneLedger

https://oneledger.io/

I'll answer by going through their whitepaper definition:

OneLedger is a cross-ledger agnostic protocol that enables high-performance scaling using a sharded and modified practical Byzantine Fault Tolerant consensus scheme -- which allows for either a permissionless or permissioned setting. By coupling public key infrastructure (PKI) with identity management, nodes (and node operators) will have a defined trust hierarchy that allows them to participate in the consensus of the OneLedger chain or any sidechain. OneLedger sidechains can be synchronized with the current state of other networks (Ethereum, Bitcoin, etc.). Any cryptocurrency that supports hashed time lock contracts (HTLC) and payment channels could be deposited into an account or address with the amount credited onto the OneLedger sidechain. This allows for a scalable and transparent solution that is off the main network or chain and is now off-loaded to the OneLedger sidechain. An arbitrary number of transactions between users can occur on a OneLedger sidechain prior to the final user requesting a withdrawal of their balance from the hashed time lock address / account on the main chain to the address / account of their choice. Essentially, OneLedger provides a scalable `off-chain` solution from any main chain and offloads the consensus to the corresponding OneLedger sidechain which inherits all of the properties of the OneLedger protocol.

OneLedger is a cross-ledger agnostic protocol that enables high-performance scaling using a sharded and modified practical Byzantine Fault Tolerant consensus scheme -- which allows for either a permissionless or permissioned setting.

- meaning that OneLedger is a new technology that can communicate with other blockchains with high scalability (a great number of transactions per second) by using sharding (each node in the network will process different transactions batches) using it's own custom consensus protocol based on the Practical Byzantine Fault tolerant scheme.

By coupling public key infrastructure (PKI) with identity management, nodes (and node operators) will have a defined trust hierarchy that allows them to participate in the consensus of the OneLedger chain or any sidechain.

- every actor in the ecosystem will be associated with a public-private key pair so that at any time the nodes in the network will know the identity of the other entity that they interact with.

OneLedger sidechains can be synchronized with the current state of other networks (Ethereum, Bitcoin, etc.). Any cryptocurrency that supports hashed time lock contracts (HTLC) and payment channels could be deposited into an account or address with the amount credited onto the OneLedger sidechain. This allows for a scalable and transparent solution that is off the main network or chain and is now off-loaded to the OneLedger sidechain.

- with OneLedger you can instantiate any nunmber of sidechains which can be synchronized with Ethereum or Bitcoin or any other blockchains that offer support for HTLC. As such, a OneLedger sidechain will perform usual operations between accounts transparently and much more faster, offloading the public blockchains.

An arbitrary number of transactions between users can occur on a OneLedger sidechain prior to the final user requesting a withdrawal of their balance from the hashed time lock address / account on the main chain to the address / account of their choice. Essentially, OneLedger provides a scalable `off-chain` solution from any main chain and offloads the consensus to the corresponding OneLedger sidechain which inherits all of the properties of the OneLedger protocol.

- as a conclusion we can view OneLedger protocol as a mean to instantiate any number of sidechains pegged to public blockchains like Ethereum, Bitcoin or any other blockchains that supports hashed time lock contracts (HTLC).

Now, in layman terms, OneLedger wants to offer businesses a simple way to use blockchains by establishing their own blockchains (OneLedger sidechains) being either persmissionless or permissioned.

A functionality that in my opinion will drive further the adoption of crypto in general and facilitate the growth of the ecosystem.

Coming back to the financial perspective, my system of evaluating a good investment opportunity is by going through the following points:

1. Hype - no matter how good, from the technical perspective, a project might be, you need to sell it also, so that's why the hype is a strong indicator regarding the selling power/know how of that team.

2. Team (Advisors and Partners) - an ICO is most often a startup and in this situation if you like the idea (which is the case here), you have to bet on the team, that's why the team comes next

3. Valuation - as a blockchain enthusiast I love almost every project that's unique and it's setup to solve real problems, but in the end I'm also an investor which means I'm also interested in the efficiency of my investment. So, if an ICO has a decent valuation according to its niche then I assume a sound and reasonable team. If I see an exagerated valuation then I can think that it might be just another money grab.

4. Token metrics - needless to say, we all want decent token metrics.

Hype - HIGH

Social media

Telegram (https://t.me/oneledger) 25503 members with 1.77% active members in the last 24h (source )

Twitter (https://twitter.com/OneLedgerTech) 5339 followers with and average of 193 likes per twitt on the last 10 twitts

Medium (https://medium.com/@OneLedger) 912 followers

Reddit (https://www.reddit.com/r/OneLedger/) 453 users

Linkedn (https://www.linkedin.com/company/oneledger-innovative-tech-inc/) 133 followers

Influencers

Icodrops (https://icodrops.com/oneledger/) hype rate - High

According to Top7 Ico (https://twitter.com/top7ico), an influencers centralizer, OneLedger was analyzed by 13 Influencers (Icodrops - already mentioned, TheGobOne, Tom, CrushCrypto, OhHeyMatty, Sergio, Lendex0, Bulk, CryptoBriefing, Benn, Liu, MoNoico, DC) and scored 86.18/100, positioned in the 13th place which all in all is a good indicator.

Team and Advisors

No need to reiterate the team here as you can easily go to their website and see each member's LinkedIn profile. Overall my impression is that we are seeing an almost all-star team that can execute pretty well.

Also they can establish strong connections and partnerships.

David Cao - the CEO has an IBM background being involved with the development of DB2 and WebSphere Commerce engines which by themselves are huge products. He is also experienced with J2EE which is a pretty complex technology.

From his experience he seems a good fit between a technical guy and a manager.

Among their advisors we can see big names like Trevor Koverko Polymath CEO, which is also one of their main investors. As such a big "VALIDATE" sign being posted on this project!

Valuation

They want to raise $15 million for 35% of their tokens which valuates them at $42.82 million, which in my opinion, even though it might seem a big valuation is still decent in regards to what they want to achieve and considering the B2B niche.

Token metrics

Again, I won't reiterate the token metrics as you can easily see them on their website at https://oneledger.io/#distribution.

All in all they have good token metrics with good vesting periods but they give a smaller than average allocation for the community of 35% which might hinder the network effect.

General facts

Public sale will start at mid June 2018 according to the latest confirmations from their Telegram admins.

KYC is over.

Tokens will be received immediately after the public sale, but they might be unlocked only upon centralized exchanges, also according to latest confirmations from their Telegram admins.

Official Website: https://oneledger.io/

Whitepaper: https://oneledger.io/wp-content/uploads/2018/05/oneledger-whitepaper-05.17.18.pdf

Official Telegram Group Chat: Hive account@oneledger